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android_kernel_motorola_sm6225/fs/nfsd/nfs4xdr.c
NeilBrown 4452435948 [PATCH] knfsd: Replace two page lists in struct svc_rqst with one 
We are planning to increase RPCSVC_MAXPAGES from about 8 to about 256.  This
means we need to be a bit careful about arrays of size RPCSVC_MAXPAGES.

struct svc_rqst contains two such arrays.  However the there are never more
that RPCSVC_MAXPAGES pages in the two arrays together, so only one array is
needed.

The two arrays are for the pages holding the request, and the pages holding
the reply.  Instead of two arrays, we can simply keep an index into where the
first reply page is.

This patch also removes a number of small inline functions that probably
server to obscure what is going on rather than clarify it, and opencode the
needed functionality.

Also remove the 'rq_restailpage' variable as it is *always* 0.  i.e.  if the
response 'xdr' structure has a non-empty tail it is always in the same pages
as the head.

 check counters are initilised and incr properly
 check for consistant usage of ++ etc
 maybe extra some inlines for common approach
 general review

Signed-off-by: Neil Brown <neilb@suse.de>
Cc: Magnus Maatta <novell@kiruna.se>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-04 07:55:15 -07:00

2523 lines
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/*
* fs/nfs/nfs4xdr.c
*
* Server-side XDR 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.
*
* TODO: Neil Brown made the following observation: We currently
* initially reserve NFSD_BUFSIZE space on the transmit queue and
* never release any of that until the request is complete.
* It would be good to calculate a new maximum response size while
* decoding the COMPOUND, and call svc_reserve with this number
* at the end of nfs4svc_decode_compoundargs.
*/
#include <linux/param.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/fs.h>
#include <linux/namei.h>
#include <linux/vfs.h>
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/state.h>
#include <linux/nfsd/xdr4.h>
#include <linux/nfsd_idmap.h>
#include <linux/nfs4.h>
#include <linux/nfs4_acl.h>
#define NFSDDBG_FACILITY NFSDDBG_XDR
static int
check_filename(char *str, int len, int err)
{
int i;
if (len == 0)
return nfserr_inval;
if (isdotent(str, len))
return err;
for (i = 0; i < len; i++)
if (str[i] == '/')
return err;
return 0;
}
/*
* START OF "GENERIC" DECODE ROUTINES.
* These may look a little ugly since they are imported from a "generic"
* set of XDR encode/decode routines which are intended to be shared by
* all of our NFSv4 implementations (OpenBSD, MacOS X...).
*
* If the pain of reading these is too great, it should be a straightforward
* task to translate them into Linux-specific versions which are more
* consistent with the style used in NFSv2/v3...
*/
#define DECODE_HEAD \
u32 *p; \
int status
#define DECODE_TAIL \
status = 0; \
out: \
return status; \
xdr_error: \
printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
status = nfserr_bad_xdr; \
goto out
#define READ32(x) (x) = ntohl(*p++)
#define READ64(x) do { \
(x) = (u64)ntohl(*p++) << 32; \
(x) |= ntohl(*p++); \
} while (0)
#define READTIME(x) do { \
p++; \
(x) = ntohl(*p++); \
p++; \
} while (0)
#define READMEM(x,nbytes) do { \
x = (char *)p; \
p += XDR_QUADLEN(nbytes); \
} while (0)
#define SAVEMEM(x,nbytes) do { \
if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
savemem(argp, p, nbytes) : \
(char *)p)) { \
printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
goto xdr_error; \
} \
p += XDR_QUADLEN(nbytes); \
} while (0)
#define COPYMEM(x,nbytes) do { \
memcpy((x), p, nbytes); \
p += XDR_QUADLEN(nbytes); \
} while (0)
/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
#define READ_BUF(nbytes) do { \
if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
p = argp->p; \
argp->p += XDR_QUADLEN(nbytes); \
} else if (!(p = read_buf(argp, nbytes))) { \
printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
goto xdr_error; \
} \
} while (0)
static u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
{
/* We want more bytes than seem to be available.
* Maybe we need a new page, maybe we have just run out
*/
int avail = (char*)argp->end - (char*)argp->p;
u32 *p;
if (avail + argp->pagelen < nbytes)
return NULL;
if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
return NULL;
/* ok, we can do it with the current plus the next page */
if (nbytes <= sizeof(argp->tmp))
p = argp->tmp;
else {
kfree(argp->tmpp);
p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
if (!p)
return NULL;
}
memcpy(p, argp->p, avail);
/* step to next page */
argp->p = page_address(argp->pagelist[0]);
argp->pagelist++;
if (argp->pagelen < PAGE_SIZE) {
argp->end = p + (argp->pagelen>>2);
argp->pagelen = 0;
} else {
argp->end = p + (PAGE_SIZE>>2);
argp->pagelen -= PAGE_SIZE;
}
memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
argp->p += XDR_QUADLEN(nbytes - avail);
return p;
}
static int
defer_free(struct nfsd4_compoundargs *argp,
void (*release)(const void *), void *p)
{
struct tmpbuf *tb;
tb = kmalloc(sizeof(*tb), GFP_KERNEL);
if (!tb)
return -ENOMEM;
tb->buf = p;
tb->release = release;
tb->next = argp->to_free;
argp->to_free = tb;
return 0;
}
static char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
{
void *new = NULL;
if (p == argp->tmp) {
new = kmalloc(nbytes, GFP_KERNEL);
if (!new) return NULL;
p = new;
memcpy(p, argp->tmp, nbytes);
} else {
BUG_ON(p != argp->tmpp);
argp->tmpp = NULL;
}
if (defer_free(argp, kfree, p)) {
kfree(new);
return NULL;
} else
return (char *)p;
}
static int
nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
{
u32 bmlen;
DECODE_HEAD;
bmval[0] = 0;
bmval[1] = 0;
READ_BUF(4);
READ32(bmlen);
if (bmlen > 1000)
goto xdr_error;
READ_BUF(bmlen << 2);
if (bmlen > 0)
READ32(bmval[0]);
if (bmlen > 1)
READ32(bmval[1]);
DECODE_TAIL;
}
static int
nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
struct nfs4_acl **acl)
{
int expected_len, len = 0;
u32 dummy32;
char *buf;
DECODE_HEAD;
iattr->ia_valid = 0;
if ((status = nfsd4_decode_bitmap(argp, bmval)))
return status;
/*
* According to spec, unsupported attributes return ERR_NOTSUPP;
* read-only attributes return ERR_INVAL.
*/
if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
return nfserr_attrnotsupp;
if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
return nfserr_inval;
READ_BUF(4);
READ32(expected_len);
if (bmval[0] & FATTR4_WORD0_SIZE) {
READ_BUF(8);
len += 8;
READ64(iattr->ia_size);
iattr->ia_valid |= ATTR_SIZE;
}
if (bmval[0] & FATTR4_WORD0_ACL) {
int nace, i;
struct nfs4_ace ace;
READ_BUF(4); len += 4;
READ32(nace);
*acl = nfs4_acl_new();
if (*acl == NULL) {
status = -ENOMEM;
goto out_nfserr;
}
defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
for (i = 0; i < nace; i++) {
READ_BUF(16); len += 16;
READ32(ace.type);
READ32(ace.flag);
READ32(ace.access_mask);
READ32(dummy32);
READ_BUF(dummy32);
len += XDR_QUADLEN(dummy32) << 2;
READMEM(buf, dummy32);
ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
status = 0;
if (ace.whotype != NFS4_ACL_WHO_NAMED)
ace.who = 0;
else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
status = nfsd_map_name_to_gid(argp->rqstp,
buf, dummy32, &ace.who);
else
status = nfsd_map_name_to_uid(argp->rqstp,
buf, dummy32, &ace.who);
if (status)
goto out_nfserr;
status = nfs4_acl_add_ace(*acl, ace.type, ace.flag,
ace.access_mask, ace.whotype, ace.who);
if (status)
goto out_nfserr;
}
} else
*acl = NULL;
if (bmval[1] & FATTR4_WORD1_MODE) {
READ_BUF(4);
len += 4;
READ32(iattr->ia_mode);
iattr->ia_mode &= (S_IFMT | S_IALLUGO);
iattr->ia_valid |= ATTR_MODE;
}
if (bmval[1] & FATTR4_WORD1_OWNER) {
READ_BUF(4);
len += 4;
READ32(dummy32);
READ_BUF(dummy32);
len += (XDR_QUADLEN(dummy32) << 2);
READMEM(buf, dummy32);
if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
goto out_nfserr;
iattr->ia_valid |= ATTR_UID;
}
if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
READ_BUF(4);
len += 4;
READ32(dummy32);
READ_BUF(dummy32);
len += (XDR_QUADLEN(dummy32) << 2);
READMEM(buf, dummy32);
if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
goto out_nfserr;
iattr->ia_valid |= ATTR_GID;
}
if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
READ_BUF(4);
len += 4;
READ32(dummy32);
switch (dummy32) {
case NFS4_SET_TO_CLIENT_TIME:
/* We require the high 32 bits of 'seconds' to be 0, and we ignore
all 32 bits of 'nseconds'. */
READ_BUF(12);
len += 12;
READ32(dummy32);
if (dummy32)
return nfserr_inval;
READ32(iattr->ia_atime.tv_sec);
READ32(iattr->ia_atime.tv_nsec);
if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
return nfserr_inval;
iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
break;
case NFS4_SET_TO_SERVER_TIME:
iattr->ia_valid |= ATTR_ATIME;
break;
default:
goto xdr_error;
}
}
if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
/* We require the high 32 bits of 'seconds' to be 0, and we ignore
all 32 bits of 'nseconds'. */
READ_BUF(12);
len += 12;
READ32(dummy32);
if (dummy32)
return nfserr_inval;
READ32(iattr->ia_ctime.tv_sec);
READ32(iattr->ia_ctime.tv_nsec);
if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
return nfserr_inval;
iattr->ia_valid |= ATTR_CTIME;
}
if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
READ_BUF(4);
len += 4;
READ32(dummy32);
switch (dummy32) {
case NFS4_SET_TO_CLIENT_TIME:
/* We require the high 32 bits of 'seconds' to be 0, and we ignore
all 32 bits of 'nseconds'. */
READ_BUF(12);
len += 12;
READ32(dummy32);
if (dummy32)
return nfserr_inval;
READ32(iattr->ia_mtime.tv_sec);
READ32(iattr->ia_mtime.tv_nsec);
if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
return nfserr_inval;
iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
break;
case NFS4_SET_TO_SERVER_TIME:
iattr->ia_valid |= ATTR_MTIME;
break;
default:
goto xdr_error;
}
}
if (len != expected_len)
goto xdr_error;
DECODE_TAIL;
out_nfserr:
status = nfserrno(status);
goto out;
}
static int
nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
{
DECODE_HEAD;
READ_BUF(4);
READ32(access->ac_req_access);
DECODE_TAIL;
}
static int
nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
{
DECODE_HEAD;
close->cl_stateowner = NULL;
READ_BUF(4 + sizeof(stateid_t));
READ32(close->cl_seqid);
READ32(close->cl_stateid.si_generation);
COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
DECODE_TAIL;
}
static int
nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
{
DECODE_HEAD;
READ_BUF(12);
READ64(commit->co_offset);
READ32(commit->co_count);
DECODE_TAIL;
}
static int
nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
{
DECODE_HEAD;
READ_BUF(4);
READ32(create->cr_type);
switch (create->cr_type) {
case NF4LNK:
READ_BUF(4);
READ32(create->cr_linklen);
READ_BUF(create->cr_linklen);
SAVEMEM(create->cr_linkname, create->cr_linklen);
break;
case NF4BLK:
case NF4CHR:
READ_BUF(8);
READ32(create->cr_specdata1);
READ32(create->cr_specdata2);
break;
case NF4SOCK:
case NF4FIFO:
case NF4DIR:
default:
break;
}
READ_BUF(4);
READ32(create->cr_namelen);
READ_BUF(create->cr_namelen);
SAVEMEM(create->cr_name, create->cr_namelen);
if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
return status;
if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
goto out;
DECODE_TAIL;
}
static inline int
nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
{
DECODE_HEAD;
READ_BUF(sizeof(stateid_t));
READ32(dr->dr_stateid.si_generation);
COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
DECODE_TAIL;
}
static inline int
nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
{
return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
}
static int
nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
{
DECODE_HEAD;
READ_BUF(4);
READ32(link->li_namelen);
READ_BUF(link->li_namelen);
SAVEMEM(link->li_name, link->li_namelen);
if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
return status;
DECODE_TAIL;
}
static int
nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
{
DECODE_HEAD;
lock->lk_replay_owner = NULL;
/*
* type, reclaim(boolean), offset, length, new_lock_owner(boolean)
*/
READ_BUF(28);
READ32(lock->lk_type);
if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
goto xdr_error;
READ32(lock->lk_reclaim);
READ64(lock->lk_offset);
READ64(lock->lk_length);
READ32(lock->lk_is_new);
if (lock->lk_is_new) {
READ_BUF(36);
READ32(lock->lk_new_open_seqid);
READ32(lock->lk_new_open_stateid.si_generation);
COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
READ32(lock->lk_new_lock_seqid);
COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
READ32(lock->lk_new_owner.len);
READ_BUF(lock->lk_new_owner.len);
READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
} else {
READ_BUF(20);
READ32(lock->lk_old_lock_stateid.si_generation);
COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
READ32(lock->lk_old_lock_seqid);
}
DECODE_TAIL;
}
static int
nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
{
DECODE_HEAD;
READ_BUF(32);
READ32(lockt->lt_type);
if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
goto xdr_error;
READ64(lockt->lt_offset);
READ64(lockt->lt_length);
COPYMEM(&lockt->lt_clientid, 8);
READ32(lockt->lt_owner.len);
READ_BUF(lockt->lt_owner.len);
READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
DECODE_TAIL;
}
static int
nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
{
DECODE_HEAD;
locku->lu_stateowner = NULL;
READ_BUF(24 + sizeof(stateid_t));
READ32(locku->lu_type);
if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
goto xdr_error;
READ32(locku->lu_seqid);
READ32(locku->lu_stateid.si_generation);
COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
READ64(locku->lu_offset);
READ64(locku->lu_length);
DECODE_TAIL;
}
static int
nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
{
DECODE_HEAD;
READ_BUF(4);
READ32(lookup->lo_len);
READ_BUF(lookup->lo_len);
SAVEMEM(lookup->lo_name, lookup->lo_len);
if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
return status;
DECODE_TAIL;
}
static int
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
{
DECODE_HEAD;
memset(open->op_bmval, 0, sizeof(open->op_bmval));
open->op_iattr.ia_valid = 0;
open->op_stateowner = NULL;
/* seqid, share_access, share_deny, clientid, ownerlen */
READ_BUF(16 + sizeof(clientid_t));
READ32(open->op_seqid);
READ32(open->op_share_access);
READ32(open->op_share_deny);
COPYMEM(&open->op_clientid, sizeof(clientid_t));
READ32(open->op_owner.len);
/* owner, open_flag */
READ_BUF(open->op_owner.len + 4);
SAVEMEM(open->op_owner.data, open->op_owner.len);
READ32(open->op_create);
switch (open->op_create) {
case NFS4_OPEN_NOCREATE:
break;
case NFS4_OPEN_CREATE:
READ_BUF(4);
READ32(open->op_createmode);
switch (open->op_createmode) {
case NFS4_CREATE_UNCHECKED:
case NFS4_CREATE_GUARDED:
if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
goto out;
break;
case NFS4_CREATE_EXCLUSIVE:
READ_BUF(8);
COPYMEM(open->op_verf.data, 8);
break;
default:
goto xdr_error;
}
break;
default:
goto xdr_error;
}
/* open_claim */
READ_BUF(4);
READ32(open->op_claim_type);
switch (open->op_claim_type) {
case NFS4_OPEN_CLAIM_NULL:
case NFS4_OPEN_CLAIM_DELEGATE_PREV:
READ_BUF(4);
READ32(open->op_fname.len);
READ_BUF(open->op_fname.len);
SAVEMEM(open->op_fname.data, open->op_fname.len);
if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
return status;
break;
case NFS4_OPEN_CLAIM_PREVIOUS:
READ_BUF(4);
READ32(open->op_delegate_type);
break;
case NFS4_OPEN_CLAIM_DELEGATE_CUR:
READ_BUF(sizeof(stateid_t) + 4);
COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
READ32(open->op_fname.len);
READ_BUF(open->op_fname.len);
SAVEMEM(open->op_fname.data, open->op_fname.len);
if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
return status;
break;
default:
goto xdr_error;
}
DECODE_TAIL;
}
static int
nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
{
DECODE_HEAD;
open_conf->oc_stateowner = NULL;
READ_BUF(4 + sizeof(stateid_t));
READ32(open_conf->oc_req_stateid.si_generation);
COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
READ32(open_conf->oc_seqid);
DECODE_TAIL;
}
static int
nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
{
DECODE_HEAD;
open_down->od_stateowner = NULL;
READ_BUF(12 + sizeof(stateid_t));
READ32(open_down->od_stateid.si_generation);
COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
READ32(open_down->od_seqid);
READ32(open_down->od_share_access);
READ32(open_down->od_share_deny);
DECODE_TAIL;
}
static int
nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
{
DECODE_HEAD;
READ_BUF(4);
READ32(putfh->pf_fhlen);
if (putfh->pf_fhlen > NFS4_FHSIZE)
goto xdr_error;
READ_BUF(putfh->pf_fhlen);
SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
DECODE_TAIL;
}
static int
nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
{
DECODE_HEAD;
READ_BUF(sizeof(stateid_t) + 12);
READ32(read->rd_stateid.si_generation);
COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
READ64(read->rd_offset);
READ32(read->rd_length);
DECODE_TAIL;
}
static int
nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
{
DECODE_HEAD;
READ_BUF(24);
READ64(readdir->rd_cookie);
COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
READ32(readdir->rd_maxcount);
if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
goto out;
DECODE_TAIL;
}
static int
nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
{
DECODE_HEAD;
READ_BUF(4);
READ32(remove->rm_namelen);
READ_BUF(remove->rm_namelen);
SAVEMEM(remove->rm_name, remove->rm_namelen);
if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
return status;
DECODE_TAIL;
}
static int
nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
{
DECODE_HEAD;
READ_BUF(4);
READ32(rename->rn_snamelen);
READ_BUF(rename->rn_snamelen + 4);
SAVEMEM(rename->rn_sname, rename->rn_snamelen);
READ32(rename->rn_tnamelen);
READ_BUF(rename->rn_tnamelen);
SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
return status;
if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
return status;
DECODE_TAIL;
}
static int
nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
{
DECODE_HEAD;
READ_BUF(sizeof(clientid_t));
COPYMEM(clientid, sizeof(clientid_t));
DECODE_TAIL;
}
static int
nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
{
DECODE_HEAD;
READ_BUF(sizeof(stateid_t));
READ32(setattr->sa_stateid.si_generation);
COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
goto out;
DECODE_TAIL;
}
static int
nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
{
DECODE_HEAD;
READ_BUF(12);
COPYMEM(setclientid->se_verf.data, 8);
READ32(setclientid->se_namelen);
READ_BUF(setclientid->se_namelen + 8);
SAVEMEM(setclientid->se_name, setclientid->se_namelen);
READ32(setclientid->se_callback_prog);
READ32(setclientid->se_callback_netid_len);
READ_BUF(setclientid->se_callback_netid_len + 4);
SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
READ32(setclientid->se_callback_addr_len);
READ_BUF(setclientid->se_callback_addr_len + 4);
SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
READ32(setclientid->se_callback_ident);
DECODE_TAIL;
}
static int
nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
{
DECODE_HEAD;
READ_BUF(8 + sizeof(nfs4_verifier));
COPYMEM(&scd_c->sc_clientid, 8);
COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
DECODE_TAIL;
}
/* Also used for NVERIFY */
static int
nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
{
#if 0
struct nfsd4_compoundargs save = {
.p = argp->p,
.end = argp->end,
.rqstp = argp->rqstp,
};
u32 ve_bmval[2];
struct iattr ve_iattr; /* request */
struct nfs4_acl *ve_acl; /* request */
#endif
DECODE_HEAD;
if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
goto out;
/* For convenience's sake, we compare raw xdr'd attributes in
* nfsd4_proc_verify; however we still decode here just to return
* correct error in case of bad xdr. */
#if 0
status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
if (status == nfserr_inval) {
status = nfserrno(status);
goto out;
}
#endif
READ_BUF(4);
READ32(verify->ve_attrlen);
READ_BUF(verify->ve_attrlen);
SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
DECODE_TAIL;
}
static int
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
{
int avail;
int v;
int len;
DECODE_HEAD;
READ_BUF(sizeof(stateid_opaque_t) + 20);
READ32(write->wr_stateid.si_generation);
COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
READ64(write->wr_offset);
READ32(write->wr_stable_how);
if (write->wr_stable_how > 2)
goto xdr_error;
READ32(write->wr_buflen);
/* Sorry .. no magic macros for this.. *
* READ_BUF(write->wr_buflen);
* SAVEMEM(write->wr_buf, write->wr_buflen);
*/
avail = (char*)argp->end - (char*)argp->p;
if (avail + argp->pagelen < write->wr_buflen) {
printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
goto xdr_error;
}
write->wr_vec[0].iov_base = p;
write->wr_vec[0].iov_len = avail;
v = 0;
len = write->wr_buflen;
while (len > write->wr_vec[v].iov_len) {
len -= write->wr_vec[v].iov_len;
v++;
write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
argp->pagelist++;
if (argp->pagelen >= PAGE_SIZE) {
write->wr_vec[v].iov_len = PAGE_SIZE;
argp->pagelen -= PAGE_SIZE;
} else {
write->wr_vec[v].iov_len = argp->pagelen;
argp->pagelen -= len;
}
}
argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
write->wr_vec[v].iov_len = len;
write->wr_vlen = v+1;
DECODE_TAIL;
}
static int
nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
{
DECODE_HEAD;
READ_BUF(12);
COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
READ32(rlockowner->rl_owner.len);
READ_BUF(rlockowner->rl_owner.len);
READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
DECODE_TAIL;
}
static int
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
{
DECODE_HEAD;
struct nfsd4_op *op;
int i;
/*
* XXX: According to spec, we should check the tag
* for UTF-8 compliance. I'm postponing this for
* now because it seems that some clients do use
* binary tags.
*/
READ_BUF(4);
READ32(argp->taglen);
READ_BUF(argp->taglen + 8);
SAVEMEM(argp->tag, argp->taglen);
READ32(argp->minorversion);
READ32(argp->opcnt);
if (argp->taglen > NFSD4_MAX_TAGLEN)
goto xdr_error;
if (argp->opcnt > 100)
goto xdr_error;
if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
if (!argp->ops) {
argp->ops = argp->iops;
printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
goto xdr_error;
}
}
for (i = 0; i < argp->opcnt; i++) {
op = &argp->ops[i];
op->replay = NULL;
/*
* We can't use READ_BUF() here because we need to handle
* a missing opcode as an OP_WRITE + 1. So we need to check
* to see if we're truly at the end of our buffer or if there
* is another page we need to flip to.
*/
if (argp->p == argp->end) {
if (argp->pagelen < 4) {
/* There isn't an opcode still on the wire */
op->opnum = OP_WRITE + 1;
op->status = nfserr_bad_xdr;
argp->opcnt = i+1;
break;
}
/*
* False alarm. We just hit a page boundary, but there
* is still data available. Move pointer across page
* boundary. *snip from READ_BUF*
*/
argp->p = page_address(argp->pagelist[0]);
argp->pagelist++;
if (argp->pagelen < PAGE_SIZE) {
argp->end = p + (argp->pagelen>>2);
argp->pagelen = 0;
} else {
argp->end = p + (PAGE_SIZE>>2);
argp->pagelen -= PAGE_SIZE;
}
}
op->opnum = ntohl(*argp->p++);
switch (op->opnum) {
case 2: /* Reserved operation */
op->opnum = OP_ILLEGAL;
if (argp->minorversion == 0)
op->status = nfserr_op_illegal;
else
op->status = nfserr_minor_vers_mismatch;
break;
case OP_ACCESS:
op->status = nfsd4_decode_access(argp, &op->u.access);
break;
case OP_CLOSE:
op->status = nfsd4_decode_close(argp, &op->u.close);
break;
case OP_COMMIT:
op->status = nfsd4_decode_commit(argp, &op->u.commit);
break;
case OP_CREATE:
op->status = nfsd4_decode_create(argp, &op->u.create);
break;
case OP_DELEGRETURN:
op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
break;
case OP_GETATTR:
op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
break;
case OP_GETFH:
op->status = nfs_ok;
break;
case OP_LINK:
op->status = nfsd4_decode_link(argp, &op->u.link);
break;
case OP_LOCK:
op->status = nfsd4_decode_lock(argp, &op->u.lock);
break;
case OP_LOCKT:
op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
break;
case OP_LOCKU:
op->status = nfsd4_decode_locku(argp, &op->u.locku);
break;
case OP_LOOKUP:
op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
break;
case OP_LOOKUPP:
op->status = nfs_ok;
break;
case OP_NVERIFY:
op->status = nfsd4_decode_verify(argp, &op->u.nverify);
break;
case OP_OPEN:
op->status = nfsd4_decode_open(argp, &op->u.open);
break;
case OP_OPEN_CONFIRM:
op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
break;
case OP_OPEN_DOWNGRADE:
op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
break;
case OP_PUTFH:
op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
break;
case OP_PUTROOTFH:
op->status = nfs_ok;
break;
case OP_READ:
op->status = nfsd4_decode_read(argp, &op->u.read);
break;
case OP_READDIR:
op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
break;
case OP_READLINK:
op->status = nfs_ok;
break;
case OP_REMOVE:
op->status = nfsd4_decode_remove(argp, &op->u.remove);
break;
case OP_RENAME:
op->status = nfsd4_decode_rename(argp, &op->u.rename);
break;
case OP_RESTOREFH:
op->status = nfs_ok;
break;
case OP_RENEW:
op->status = nfsd4_decode_renew(argp, &op->u.renew);
break;
case OP_SAVEFH:
op->status = nfs_ok;
break;
case OP_SETATTR:
op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
break;
case OP_SETCLIENTID:
op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
break;
case OP_SETCLIENTID_CONFIRM:
op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
break;
case OP_VERIFY:
op->status = nfsd4_decode_verify(argp, &op->u.verify);
break;
case OP_WRITE:
op->status = nfsd4_decode_write(argp, &op->u.write);
break;
case OP_RELEASE_LOCKOWNER:
op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
break;
default:
op->opnum = OP_ILLEGAL;
op->status = nfserr_op_illegal;
break;
}
if (op->status) {
argp->opcnt = i+1;
break;
}
}
DECODE_TAIL;
}
/*
* END OF "GENERIC" DECODE ROUTINES.
*/
/*
* START OF "GENERIC" ENCODE ROUTINES.
* These may look a little ugly since they are imported from a "generic"
* set of XDR encode/decode routines which are intended to be shared by
* all of our NFSv4 implementations (OpenBSD, MacOS X...).
*
* If the pain of reading these is too great, it should be a straightforward
* task to translate them into Linux-specific versions which are more
* consistent with the style used in NFSv2/v3...
*/
#define ENCODE_HEAD u32 *p
#define WRITE32(n) *p++ = htonl(n)
#define WRITE64(n) do { \
*p++ = htonl((u32)((n) >> 32)); \
*p++ = htonl((u32)(n)); \
} while (0)
#define WRITEMEM(ptr,nbytes) do { \
*(p + XDR_QUADLEN(nbytes) -1) = 0; \
memcpy(p, ptr, nbytes); \
p += XDR_QUADLEN(nbytes); \
} while (0)
#define WRITECINFO(c) do { \
*p++ = htonl(c.atomic); \
*p++ = htonl(c.before_ctime_sec); \
*p++ = htonl(c.before_ctime_nsec); \
*p++ = htonl(c.after_ctime_sec); \
*p++ = htonl(c.after_ctime_nsec); \
} while (0)
#define RESERVE_SPACE(nbytes) do { \
p = resp->p; \
BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
} while (0)
#define ADJUST_ARGS() resp->p = p
/*
* Header routine to setup seqid operation replay cache
*/
#define ENCODE_SEQID_OP_HEAD \
u32 *p; \
u32 *save; \
\
save = resp->p;
/*
* Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
* is where sequence id's are incremented, and the replay cache is filled.
* Note that we increment sequence id's here, at the last moment, so we're sure
* we know whether the error to be returned is a sequence id mutating error.
*/
#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
if (seqid_mutating_err(nfserr) && stateowner) { \
stateowner->so_seqid++; \
stateowner->so_replay.rp_status = nfserr; \
stateowner->so_replay.rp_buflen = \
(((char *)(resp)->p - (char *)save)); \
memcpy(stateowner->so_replay.rp_buf, save, \
stateowner->so_replay.rp_buflen); \
} } while (0);
static u32 nfs4_ftypes[16] = {
NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
NF4DIR, NF4BAD, NF4BLK, NF4BAD,
NF4REG, NF4BAD, NF4LNK, NF4BAD,
NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
};
static int
nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
u32 **p, int *buflen)
{
int status;
if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
return nfserr_resource;
if (whotype != NFS4_ACL_WHO_NAMED)
status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
else if (group)
status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
else
status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
if (status < 0)
return nfserrno(status);
*p = xdr_encode_opaque(*p, NULL, status);
*buflen -= (XDR_QUADLEN(status) << 2) + 4;
BUG_ON(*buflen < 0);
return 0;
}
static inline int
nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
{
return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
}
static inline int
nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
{
return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
}
static inline int
nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
u32 **p, int *buflen)
{
return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
}
/*
* Note: @fhp can be NULL; in this case, we might have to compose the filehandle
* ourselves.
*
* @countp is the buffer size in _words_; upon successful return this becomes
* replaced with the number of words written.
*/
int
nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
struct svc_rqst *rqstp)
{
u32 bmval0 = bmval[0];
u32 bmval1 = bmval[1];
struct kstat stat;
struct svc_fh tempfh;
struct kstatfs statfs;
int buflen = *countp << 2;
u32 *attrlenp;
u32 dummy;
u64 dummy64;
u32 *p = buffer;
int status;
int aclsupport = 0;
struct nfs4_acl *acl = NULL;
BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
status = vfs_getattr(exp->ex_mnt, dentry, &stat);
if (status)
goto out_nfserr;
if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
(bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
FATTR4_WORD1_SPACE_TOTAL))) {
status = vfs_statfs(dentry, &statfs);
if (status)
goto out_nfserr;
}
if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
fh_init(&tempfh, NFS4_FHSIZE);
status = fh_compose(&tempfh, exp, dentry, NULL);
if (status)
goto out;
fhp = &tempfh;
}
if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
| FATTR4_WORD0_SUPPORTED_ATTRS)) {
status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
aclsupport = (status == 0);
if (bmval0 & FATTR4_WORD0_ACL) {
if (status == -EOPNOTSUPP)
bmval0 &= ~FATTR4_WORD0_ACL;
else if (status == -EINVAL) {
status = nfserr_attrnotsupp;
goto out;
} else if (status != 0)
goto out_nfserr;
}
}
if ((buflen -= 16) < 0)
goto out_resource;
WRITE32(2);
WRITE32(bmval0);
WRITE32(bmval1);
attrlenp = p++; /* to be backfilled later */
if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
if ((buflen -= 12) < 0)
goto out_resource;
WRITE32(2);
WRITE32(aclsupport ?
NFSD_SUPPORTED_ATTRS_WORD0 :
NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
}
if (bmval0 & FATTR4_WORD0_TYPE) {
if ((buflen -= 4) < 0)
goto out_resource;
dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
if (dummy == NF4BAD)
goto out_serverfault;
WRITE32(dummy);
}
if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
if ((buflen -= 4) < 0)
goto out_resource;
if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
WRITE32(NFS4_FH_PERSISTENT);
else
WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
}
if (bmval0 & FATTR4_WORD0_CHANGE) {
/*
* Note: This _must_ be consistent with the scheme for writing
* change_info, so any changes made here must be reflected there
* as well. (See xdr4.h:set_change_info() and the WRITECINFO()
* macro above.)
*/
if ((buflen -= 8) < 0)
goto out_resource;
WRITE32(stat.ctime.tv_sec);
WRITE32(stat.ctime.tv_nsec);
}
if (bmval0 & FATTR4_WORD0_SIZE) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64(stat.size);
}
if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(1);
}
if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(1);
}
if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(0);
}
if (bmval0 & FATTR4_WORD0_FSID) {
if ((buflen -= 16) < 0)
goto out_resource;
if (is_fsid(fhp, rqstp->rq_reffh)) {
WRITE64((u64)exp->ex_fsid);
WRITE64((u64)0);
} else {
WRITE32(0);
WRITE32(MAJOR(stat.dev));
WRITE32(0);
WRITE32(MINOR(stat.dev));
}
}
if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(0);
}
if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(NFSD_LEASE_TIME);
}
if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(0);
}
if (bmval0 & FATTR4_WORD0_ACL) {
struct nfs4_ace *ace;
struct list_head *h;
if (acl == NULL) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(0);
goto out_acl;
}
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(acl->naces);
list_for_each(h, &acl->ace_head) {
ace = list_entry(h, struct nfs4_ace, l_ace);
if ((buflen -= 4*3) < 0)
goto out_resource;
WRITE32(ace->type);
WRITE32(ace->flag);
WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
status = nfsd4_encode_aclname(rqstp, ace->whotype,
ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
&p, &buflen);
if (status == nfserr_resource)
goto out_resource;
if (status)
goto out;
}
}
out_acl:
if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(aclsupport ?
ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
}
if (bmval0 & FATTR4_WORD0_CANSETTIME) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(1);
}
if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(1);
}
if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(1);
}
if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(1);
}
if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
if (buflen < 0)
goto out_resource;
WRITE32(fhp->fh_handle.fh_size);
WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
}
if (bmval0 & FATTR4_WORD0_FILEID) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64((u64) stat.ino);
}
if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64((u64) statfs.f_ffree);
}
if (bmval0 & FATTR4_WORD0_FILES_FREE) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64((u64) statfs.f_ffree);
}
if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64((u64) statfs.f_files);
}
if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(1);
}
if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64(~(u64)0);
}
if (bmval0 & FATTR4_WORD0_MAXLINK) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(255);
}
if (bmval0 & FATTR4_WORD0_MAXNAME) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(~(u32) 0);
}
if (bmval0 & FATTR4_WORD0_MAXREAD) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64((u64) NFSSVC_MAXBLKSIZE);
}
if (bmval0 & FATTR4_WORD0_MAXWRITE) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64((u64) NFSSVC_MAXBLKSIZE);
}
if (bmval1 & FATTR4_WORD1_MODE) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(stat.mode & S_IALLUGO);
}
if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(1);
}
if (bmval1 & FATTR4_WORD1_NUMLINKS) {
if ((buflen -= 4) < 0)
goto out_resource;
WRITE32(stat.nlink);
}
if (bmval1 & FATTR4_WORD1_OWNER) {
status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
if (status == nfserr_resource)
goto out_resource;
if (status)
goto out;
}
if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
if (status == nfserr_resource)
goto out_resource;
if (status)
goto out;
}
if (bmval1 & FATTR4_WORD1_RAWDEV) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE32((u32) MAJOR(stat.rdev));
WRITE32((u32) MINOR(stat.rdev));
}
if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
if ((buflen -= 8) < 0)
goto out_resource;
dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
WRITE64(dummy64);
}
if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
if ((buflen -= 8) < 0)
goto out_resource;
dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
WRITE64(dummy64);
}
if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
if ((buflen -= 8) < 0)
goto out_resource;
dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
WRITE64(dummy64);
}
if (bmval1 & FATTR4_WORD1_SPACE_USED) {
if ((buflen -= 8) < 0)
goto out_resource;
dummy64 = (u64)stat.blocks << 9;
WRITE64(dummy64);
}
if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
if ((buflen -= 12) < 0)
goto out_resource;
WRITE32(0);
WRITE32(stat.atime.tv_sec);
WRITE32(stat.atime.tv_nsec);
}
if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
if ((buflen -= 12) < 0)
goto out_resource;
WRITE32(0);
WRITE32(1);
WRITE32(0);
}
if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
if ((buflen -= 12) < 0)
goto out_resource;
WRITE32(0);
WRITE32(stat.ctime.tv_sec);
WRITE32(stat.ctime.tv_nsec);
}
if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
if ((buflen -= 12) < 0)
goto out_resource;
WRITE32(0);
WRITE32(stat.mtime.tv_sec);
WRITE32(stat.mtime.tv_nsec);
}
if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
struct dentry *mnt_pnt, *mnt_root;
if ((buflen -= 8) < 0)
goto out_resource;
mnt_root = exp->ex_mnt->mnt_root;
if (mnt_root->d_inode == dentry->d_inode) {
mnt_pnt = exp->ex_mnt->mnt_mountpoint;
WRITE64((u64) mnt_pnt->d_inode->i_ino);
} else
WRITE64((u64) stat.ino);
}
*attrlenp = htonl((char *)p - (char *)attrlenp - 4);
*countp = p - buffer;
status = nfs_ok;
out:
nfs4_acl_free(acl);
if (fhp == &tempfh)
fh_put(&tempfh);
return status;
out_nfserr:
status = nfserrno(status);
goto out;
out_resource:
*countp = 0;
status = nfserr_resource;
goto out;
out_serverfault:
status = nfserr_serverfault;
goto out;
}
static int
nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
const char *name, int namlen, u32 *p, int *buflen)
{
struct svc_export *exp = cd->rd_fhp->fh_export;
struct dentry *dentry;
int nfserr;
dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
if (IS_ERR(dentry))
return nfserrno(PTR_ERR(dentry));
exp_get(exp);
if (d_mountpoint(dentry)) {
if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
/*
* -EAGAIN is the only error returned from
* nfsd_cross_mnt() and it indicates that an
* up-call has been initiated to fill in the export
* options on exp. When the answer comes back,
* this call will be retried.
*/
nfserr = nfserr_dropit;
goto out_put;
}
}
nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
cd->rd_rqstp);
out_put:
dput(dentry);
exp_put(exp);
return nfserr;
}
static u32 *
nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr)
{
u32 *attrlenp;
if (buflen < 6)
return NULL;
*p++ = htonl(2);
*p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
*p++ = htonl(0); /* bmval1 */
attrlenp = p++;
*p++ = nfserr; /* no htonl */
*attrlenp = htonl((char *)p - (char *)attrlenp - 4);
return p;
}
static int
nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
loff_t offset, ino_t ino, unsigned int d_type)
{
struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
int buflen;
u32 *p = cd->buffer;
int nfserr = nfserr_toosmall;
/* In nfsv4, "." and ".." never make it onto the wire.. */
if (name && isdotent(name, namlen)) {
cd->common.err = nfs_ok;
return 0;
}
if (cd->offset)
xdr_encode_hyper(cd->offset, (u64) offset);
buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
if (buflen < 0)
goto fail;
*p++ = xdr_one; /* mark entry present */
cd->offset = p; /* remember pointer */
p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
p = xdr_encode_array(p, name, namlen); /* name length & name */
nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
switch (nfserr) {
case nfs_ok:
p += buflen;
break;
case nfserr_resource:
nfserr = nfserr_toosmall;
goto fail;
case nfserr_dropit:
goto fail;
default:
/*
* If the client requested the RDATTR_ERROR attribute,
* we stuff the error code into this attribute
* and continue. If this attribute was not requested,
* then in accordance with the spec, we fail the
* entire READDIR operation(!)
*/
if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
goto fail;
p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
if (p == NULL) {
nfserr = nfserr_toosmall;
goto fail;
}
}
cd->buflen -= (p - cd->buffer);
cd->buffer = p;
cd->common.err = nfs_ok;
return 0;
fail:
cd->common.err = nfserr;
return -EINVAL;
}
static void
nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
{
ENCODE_HEAD;
if (!nfserr) {
RESERVE_SPACE(8);
WRITE32(access->ac_supported);
WRITE32(access->ac_resp_access);
ADJUST_ARGS();
}
}
static void
nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr) {
RESERVE_SPACE(sizeof(stateid_t));
WRITE32(close->cl_stateid.si_generation);
WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
ADJUST_ARGS();
}
ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
}
static void
nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
{
ENCODE_HEAD;
if (!nfserr) {
RESERVE_SPACE(8);
WRITEMEM(commit->co_verf.data, 8);
ADJUST_ARGS();
}
}
static void
nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
{
ENCODE_HEAD;
if (!nfserr) {
RESERVE_SPACE(32);
WRITECINFO(create->cr_cinfo);
WRITE32(2);
WRITE32(create->cr_bmval[0]);
WRITE32(create->cr_bmval[1]);
ADJUST_ARGS();
}
}
static int
nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
{
struct svc_fh *fhp = getattr->ga_fhp;
int buflen;
if (nfserr)
return nfserr;
buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
resp->p, &buflen, getattr->ga_bmval,
resp->rqstp);
if (!nfserr)
resp->p += buflen;
return nfserr;
}
static void
nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
{
unsigned int len;
ENCODE_HEAD;
if (!nfserr) {
len = fhp->fh_handle.fh_size;
RESERVE_SPACE(len + 4);
WRITE32(len);
WRITEMEM(&fhp->fh_handle.fh_base, len);
ADJUST_ARGS();
}
}
/*
* Including all fields other than the name, a LOCK4denied structure requires
* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
*/
static void
nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
{
ENCODE_HEAD;
RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
WRITE64(ld->ld_start);
WRITE64(ld->ld_length);
WRITE32(ld->ld_type);
if (ld->ld_sop) {
WRITEMEM(&ld->ld_clientid, 8);
WRITE32(ld->ld_sop->so_owner.len);
WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
} else { /* non - nfsv4 lock in conflict, no clientid nor owner */
WRITE64((u64)0); /* clientid */
WRITE32(0); /* length of owner name */
}
ADJUST_ARGS();
}
static void
nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr) {
RESERVE_SPACE(4 + sizeof(stateid_t));
WRITE32(lock->lk_resp_stateid.si_generation);
WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
ADJUST_ARGS();
} else if (nfserr == nfserr_denied)
nfsd4_encode_lock_denied(resp, &lock->lk_denied);
ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
}
static void
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
{
if (nfserr == nfserr_denied)
nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
}
static void
nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr) {
RESERVE_SPACE(sizeof(stateid_t));
WRITE32(locku->lu_stateid.si_generation);
WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
ADJUST_ARGS();
}
ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
}
static void
nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
{
ENCODE_HEAD;
if (!nfserr) {
RESERVE_SPACE(20);
WRITECINFO(link->li_cinfo);
ADJUST_ARGS();
}
}
static void
nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
{
ENCODE_SEQID_OP_HEAD;
if (nfserr)
goto out;
RESERVE_SPACE(36 + sizeof(stateid_t));
WRITE32(open->op_stateid.si_generation);
WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
WRITECINFO(open->op_cinfo);
WRITE32(open->op_rflags);
WRITE32(2);
WRITE32(open->op_bmval[0]);
WRITE32(open->op_bmval[1]);
WRITE32(open->op_delegate_type);
ADJUST_ARGS();
switch (open->op_delegate_type) {
case NFS4_OPEN_DELEGATE_NONE:
break;
case NFS4_OPEN_DELEGATE_READ:
RESERVE_SPACE(20 + sizeof(stateid_t));
WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
WRITE32(open->op_recall);
/*
* TODO: ACE's in delegations
*/
WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
WRITE32(0);
WRITE32(0);
WRITE32(0); /* XXX: is NULL principal ok? */
ADJUST_ARGS();
break;
case NFS4_OPEN_DELEGATE_WRITE:
RESERVE_SPACE(32 + sizeof(stateid_t));
WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
WRITE32(0);
/*
* TODO: space_limit's in delegations
*/
WRITE32(NFS4_LIMIT_SIZE);
WRITE32(~(u32)0);
WRITE32(~(u32)0);
/*
* TODO: ACE's in delegations
*/
WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
WRITE32(0);
WRITE32(0);
WRITE32(0); /* XXX: is NULL principal ok? */
ADJUST_ARGS();
break;
default:
BUG();
}
/* XXX save filehandle here */
out:
ENCODE_SEQID_OP_TAIL(open->op_stateowner);
}
static void
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr) {
RESERVE_SPACE(sizeof(stateid_t));
WRITE32(oc->oc_resp_stateid.si_generation);
WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
ADJUST_ARGS();
}
ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
}
static void
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr) {
RESERVE_SPACE(sizeof(stateid_t));
WRITE32(od->od_stateid.si_generation);
WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
ADJUST_ARGS();
}
ENCODE_SEQID_OP_TAIL(od->od_stateowner);
}
static int
nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr,
struct nfsd4_read *read)
{
u32 eof;
int v, pn;
unsigned long maxcount;
long len;
ENCODE_HEAD;
if (nfserr)
return nfserr;
if (resp->xbuf->page_len)
return nfserr_resource;
RESERVE_SPACE(8); /* eof flag and byte count */
maxcount = NFSSVC_MAXBLKSIZE;
if (maxcount > read->rd_length)
maxcount = read->rd_length;
len = maxcount;
v = 0;
while (len > 0) {
pn = resp->rqstp->rq_resused++;
read->rd_iov[v].iov_base =
page_address(resp->rqstp->rq_respages[pn]);
read->rd_iov[v].iov_len =
len < PAGE_SIZE ? len : PAGE_SIZE;
v++;
len -= PAGE_SIZE;
}
read->rd_vlen = v;
nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
read->rd_offset, read->rd_iov, read->rd_vlen,
&maxcount);
if (nfserr == nfserr_symlink)
nfserr = nfserr_inval;
if (nfserr)
return nfserr;
eof = (read->rd_offset + maxcount >=
read->rd_fhp->fh_dentry->d_inode->i_size);
WRITE32(eof);
WRITE32(maxcount);
ADJUST_ARGS();
resp->xbuf->head[0].iov_len = (char*)p
- (char*)resp->xbuf->head[0].iov_base;
resp->xbuf->page_len = maxcount;
/* Use rest of head for padding and remaining ops: */
resp->xbuf->tail[0].iov_base = p;
resp->xbuf->tail[0].iov_len = 0;
if (maxcount&3) {
RESERVE_SPACE(4);
WRITE32(0);
resp->xbuf->tail[0].iov_base += maxcount&3;
resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
ADJUST_ARGS();
}
return 0;
}
static int
nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
{
int maxcount;
char *page;
ENCODE_HEAD;
if (nfserr)
return nfserr;
if (resp->xbuf->page_len)
return nfserr_resource;
page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
maxcount = PAGE_SIZE;
RESERVE_SPACE(4);
/*
* XXX: By default, the ->readlink() VFS op will truncate symlinks
* if they would overflow the buffer. Is this kosher in NFSv4? If
* not, one easy fix is: if ->readlink() precisely fills the buffer,
* assume that truncation occurred, and return NFS4ERR_RESOURCE.
*/
nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
if (nfserr == nfserr_isdir)
return nfserr_inval;
if (nfserr)
return nfserr;
WRITE32(maxcount);
ADJUST_ARGS();
resp->xbuf->head[0].iov_len = (char*)p
- (char*)resp->xbuf->head[0].iov_base;
resp->xbuf->page_len = maxcount;
/* Use rest of head for padding and remaining ops: */
resp->xbuf->tail[0].iov_base = p;
resp->xbuf->tail[0].iov_len = 0;
if (maxcount&3) {
RESERVE_SPACE(4);
WRITE32(0);
resp->xbuf->tail[0].iov_base += maxcount&3;
resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
ADJUST_ARGS();
}
return 0;
}
static int
nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
{
int maxcount;
loff_t offset;
u32 *page, *savep, *tailbase;
ENCODE_HEAD;
if (nfserr)
return nfserr;
if (resp->xbuf->page_len)
return nfserr_resource;
RESERVE_SPACE(8); /* verifier */
savep = p;
/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
WRITE32(0);
WRITE32(0);
ADJUST_ARGS();
resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
tailbase = p;
maxcount = PAGE_SIZE;
if (maxcount > readdir->rd_maxcount)
maxcount = readdir->rd_maxcount;
/*
* Convert from bytes to words, account for the two words already
* written, make sure to leave two words at the end for the next
* pointer and eof field.
*/
maxcount = (maxcount >> 2) - 4;
if (maxcount < 0) {
nfserr = nfserr_toosmall;
goto err_no_verf;
}
page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
readdir->common.err = 0;
readdir->buflen = maxcount;
readdir->buffer = page;
readdir->offset = NULL;
offset = readdir->rd_cookie;
nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
&offset,
&readdir->common, nfsd4_encode_dirent);
if (nfserr == nfs_ok &&
readdir->common.err == nfserr_toosmall &&
readdir->buffer == page)
nfserr = nfserr_toosmall;
if (nfserr == nfserr_symlink)
nfserr = nfserr_notdir;
if (nfserr)
goto err_no_verf;
if (readdir->offset)
xdr_encode_hyper(readdir->offset, offset);
p = readdir->buffer;
*p++ = 0; /* no more entries */
*p++ = htonl(readdir->common.err == nfserr_eof);
resp->xbuf->page_len = ((char*)p) - (char*)page_address(
resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
/* Use rest of head for padding and remaining ops: */
resp->xbuf->tail[0].iov_base = tailbase;
resp->xbuf->tail[0].iov_len = 0;
resp->p = resp->xbuf->tail[0].iov_base;
resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
return 0;
err_no_verf:
p = savep;
ADJUST_ARGS();
return nfserr;
}
static void
nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
{
ENCODE_HEAD;
if (!nfserr) {
RESERVE_SPACE(20);
WRITECINFO(remove->rm_cinfo);
ADJUST_ARGS();
}
}
static void
nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
{
ENCODE_HEAD;
if (!nfserr) {
RESERVE_SPACE(40);
WRITECINFO(rename->rn_sinfo);
WRITECINFO(rename->rn_tinfo);
ADJUST_ARGS();
}
}
/*
* The SETATTR encode routine is special -- it always encodes a bitmap,
* regardless of the error status.
*/
static void
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
{
ENCODE_HEAD;
RESERVE_SPACE(12);
if (nfserr) {
WRITE32(2);
WRITE32(0);
WRITE32(0);
}
else {
WRITE32(2);
WRITE32(setattr->sa_bmval[0]);
WRITE32(setattr->sa_bmval[1]);
}
ADJUST_ARGS();
}
static void
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
{
ENCODE_HEAD;
if (!nfserr) {
RESERVE_SPACE(8 + sizeof(nfs4_verifier));
WRITEMEM(&scd->se_clientid, 8);
WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
ADJUST_ARGS();
}
else if (nfserr == nfserr_clid_inuse) {
RESERVE_SPACE(8);
WRITE32(0);
WRITE32(0);
ADJUST_ARGS();
}
}
static void
nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
{
ENCODE_HEAD;
if (!nfserr) {
RESERVE_SPACE(16);
WRITE32(write->wr_bytes_written);
WRITE32(write->wr_how_written);
WRITEMEM(write->wr_verifier.data, 8);
ADJUST_ARGS();
}
}
void
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
u32 *statp;
ENCODE_HEAD;
RESERVE_SPACE(8);
WRITE32(op->opnum);
statp = p++; /* to be backfilled at the end */
ADJUST_ARGS();
switch (op->opnum) {
case OP_ACCESS:
nfsd4_encode_access(resp, op->status, &op->u.access);
break;
case OP_CLOSE:
nfsd4_encode_close(resp, op->status, &op->u.close);
break;
case OP_COMMIT:
nfsd4_encode_commit(resp, op->status, &op->u.commit);
break;
case OP_CREATE:
nfsd4_encode_create(resp, op->status, &op->u.create);
break;
case OP_DELEGRETURN:
break;
case OP_GETATTR:
op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
break;
case OP_GETFH:
nfsd4_encode_getfh(resp, op->status, op->u.getfh);
break;
case OP_LINK:
nfsd4_encode_link(resp, op->status, &op->u.link);
break;
case OP_LOCK:
nfsd4_encode_lock(resp, op->status, &op->u.lock);
break;
case OP_LOCKT:
nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
break;
case OP_LOCKU:
nfsd4_encode_locku(resp, op->status, &op->u.locku);
break;
case OP_LOOKUP:
break;
case OP_LOOKUPP:
break;
case OP_NVERIFY:
break;
case OP_OPEN:
nfsd4_encode_open(resp, op->status, &op->u.open);
break;
case OP_OPEN_CONFIRM:
nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
break;
case OP_OPEN_DOWNGRADE:
nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
break;
case OP_PUTFH:
break;
case OP_PUTROOTFH:
break;
case OP_READ:
op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
break;
case OP_READDIR:
op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
break;
case OP_READLINK:
op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
break;
case OP_REMOVE:
nfsd4_encode_remove(resp, op->status, &op->u.remove);
break;
case OP_RENAME:
nfsd4_encode_rename(resp, op->status, &op->u.rename);
break;
case OP_RENEW:
break;
case OP_RESTOREFH:
break;
case OP_SAVEFH:
break;
case OP_SETATTR:
nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
break;
case OP_SETCLIENTID:
nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
break;
case OP_SETCLIENTID_CONFIRM:
break;
case OP_VERIFY:
break;
case OP_WRITE:
nfsd4_encode_write(resp, op->status, &op->u.write);
break;
case OP_RELEASE_LOCKOWNER:
break;
default:
break;
}
/*
* Note: We write the status directly, instead of using WRITE32(),
* since it is already in network byte order.
*/
*statp = op->status;
}
/*
* Encode the reply stored in the stateowner reply cache
*
* XDR note: do not encode rp->rp_buflen: the buffer contains the
* previously sent already encoded operation.
*
* called with nfs4_lock_state() held
*/
void
nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
ENCODE_HEAD;
struct nfs4_replay *rp = op->replay;
BUG_ON(!rp);
RESERVE_SPACE(8);
WRITE32(op->opnum);
*p++ = rp->rp_status; /* already xdr'ed */
ADJUST_ARGS();
RESERVE_SPACE(rp->rp_buflen);
WRITEMEM(rp->rp_buf, rp->rp_buflen);
ADJUST_ARGS();
}
/*
* END OF "GENERIC" ENCODE ROUTINES.
*/
int
nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
{
return xdr_ressize_check(rqstp, p);
}
void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
{
if (args->ops != args->iops) {
kfree(args->ops);
args->ops = args->iops;
}
kfree(args->tmpp);
args->tmpp = NULL;
while (args->to_free) {
struct tmpbuf *tb = args->to_free;
args->to_free = tb->next;
tb->release(tb->buf);
kfree(tb);
}
}
int
nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
{
int status;
args->p = p;
args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
args->pagelist = rqstp->rq_arg.pages;
args->pagelen = rqstp->rq_arg.page_len;
args->tmpp = NULL;
args->to_free = NULL;
args->ops = args->iops;
args->rqstp = rqstp;
status = nfsd4_decode_compound(args);
if (status) {
nfsd4_release_compoundargs(args);
}
return !status;
}
int
nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
{
/*
* All that remains is to write the tag and operation count...
*/
struct kvec *iov;
p = resp->tagp;
*p++ = htonl(resp->taglen);
memcpy(p, resp->tag, resp->taglen);
p += XDR_QUADLEN(resp->taglen);
*p++ = htonl(resp->opcnt);
if (rqstp->rq_res.page_len)
iov = &rqstp->rq_res.tail[0];
else
iov = &rqstp->rq_res.head[0];
iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
BUG_ON(iov->iov_len > PAGE_SIZE);
return 1;
}
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
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