linux/fs/nfsd/nfs4xdr.c

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/*
* 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/fs.h>
#include <linux/namei.h>
#include <linux/vfs.h>
nfsd41: exchange_id operation Implement the exchange_id operation confoming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-28 Based on the client provided name, hash a client id. If a confirmed one is found, compare the op's creds and verifier. If the creds match and the verifier is different then expire the old client (client re-incarnated), otherwise, if both match, assume it's a replay and ignore it. If an unconfirmed client is found, then copy the new creds and verifer if need update, otherwise assume replay. The client is moved to a confirmed state on create_session. In the nfs41 branch set the exchange_id flags to EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_SUPP_MOVED_REFER (pNFS is not supported, Referrals are supported, Migration is not.). Address various scenarios from section 18.35 of the spec: 1. Check for EXCHGID4_FLAG_UPD_CONFIRMED_REC_A and set EXCHGID4_FLAG_CONFIRMED_R as appropriate. 2. Return error codes per 18.35.4 scenarios. 3. Update client records or generate new client ids depending on scenario. Note: 18.35.4 case 3 probably still needs revisiting. The handling seems not quite right. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamosn <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: use utsname for major_id (and copy to server_scope)] [nfsd41: fix handling of various exchange id scenarios] Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: reverse use of EXCHGID4_INVAL_FLAG_MASK_A] [simplify nfsd4_encode_exchange_id error handling] [nfsd41: embed an xdr_netobj in nfsd4_exchange_id] [nfsd41: return nfserr_serverfault for spa_how == SP4_MACH_CRED] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-04-03 07:28:01 +02:00
#include <linux/utsname.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>
#include <linux/sunrpc/gss_api.h>
#include <linux/sunrpc/svcauth_gss.h>
#define NFSDDBG_FACILITY NFSDDBG_XDR
/*
* As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
* directory in order to indicate to the client that a filesystem boundary is present
* We use a fixed fsid for a referral
*/
#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
static __be32
check_filename(char *str, int len, __be32 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;
}
#define DECODE_HEAD \
__be32 *p; \
__be32 status
#define DECODE_TAIL \
status = 0; \
out: \
return status; \
xdr_error: \
dprintk("NFSD: 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)) { \
dprintk("NFSD: 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))) { \
dprintk("NFSD: xdr error (%s:%d)\n", \
__FILE__, __LINE__); \
goto xdr_error; \
} \
} while (0)
static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
{
/* We want more bytes than seem to be available.
* Maybe we need a new page, maybe we have just run out
*/
unsigned int avail = (char *)argp->end - (char *)argp->p;
__be32 *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;
}
/*
* The following memcpy is safe because read_buf is always
* called with nbytes > avail, and the two cases above both
* guarantee p points to at least nbytes bytes.
*/
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 zero_clientid(clientid_t *clid)
{
return (clid->cl_boot == 0) && (clid->cl_id == 0);
}
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, __be32 *p, int nbytes)
{
if (p == argp->tmp) {
p = kmalloc(nbytes, GFP_KERNEL);
if (!p)
return NULL;
memcpy(p, argp->tmp, nbytes);
} else {
BUG_ON(p != argp->tmpp);
argp->tmpp = NULL;
}
if (defer_free(argp, kfree, p)) {
kfree(p);
return NULL;
} else
return (char *)p;
}
static __be32
nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
{
u32 bmlen;
DECODE_HEAD;
bmval[0] = 0;
bmval[1] = 0;
bmval[2] = 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]);
if (bmlen > 2)
READ32(bmval[2]);
DECODE_TAIL;
}
static __be32
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;
int host_err;
DECODE_HEAD;
iattr->ia_valid = 0;
if ((status = nfsd4_decode_bitmap(argp, bmval)))
return status;
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;
struct nfs4_ace *ace;
READ_BUF(4); len += 4;
READ32(nace);
if (nace > NFS4_ACL_MAX)
return nfserr_resource;
*acl = nfs4_acl_new(nace);
if (*acl == NULL) {
host_err = -ENOMEM;
goto out_nfserr;
}
defer_free(argp, kfree, *acl);
(*acl)->naces = nace;
for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
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);
host_err = 0;
if (ace->whotype != NFS4_ACL_WHO_NAMED)
ace->who = 0;
else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
host_err = nfsd_map_name_to_gid(argp->rqstp,
buf, dummy32, &ace->who);
else
host_err = nfsd_map_name_to_uid(argp->rqstp,
buf, dummy32, &ace->who);
if (host_err)
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 ((host_err = 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 ((host_err = 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_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 (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
|| bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
|| bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
READ_BUF(expected_len - len);
else if (len != expected_len)
goto xdr_error;
DECODE_TAIL;
out_nfserr:
status = nfserrno(host_err);
goto out;
}
static __be32
nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
{
DECODE_HEAD;
READ_BUF(sizeof(stateid_t));
READ32(sid->si_generation);
COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
DECODE_TAIL;
}
static __be32
nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
{
DECODE_HEAD;
READ_BUF(4);
READ32(access->ac_req_access);
DECODE_TAIL;
}
static __be32
nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
{
DECODE_HEAD;
close->cl_stateowner = NULL;
READ_BUF(4);
READ32(close->cl_seqid);
return nfsd4_decode_stateid(argp, &close->cl_stateid);
DECODE_TAIL;
}
static __be32
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 __be32
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;
status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
&create->cr_acl);
if (status)
goto out;
DECODE_TAIL;
}
static inline __be32
nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
{
return nfsd4_decode_stateid(argp, &dr->dr_stateid);
}
static inline __be32
nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
{
return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
}
static __be32
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 __be32
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(4);
READ32(lock->lk_new_open_seqid);
status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
if (status)
return status;
READ_BUF(8 + sizeof(clientid_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 {
status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
if (status)
return status;
READ_BUF(4);
READ32(lock->lk_old_lock_seqid);
}
DECODE_TAIL;
}
static __be32
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);
if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
return nfserr_inval;
DECODE_TAIL;
}
static __be32
nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
{
DECODE_HEAD;
locku->lu_stateowner = NULL;
READ_BUF(8);
READ32(locku->lu_type);
if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
goto xdr_error;
READ32(locku->lu_seqid);
status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
if (status)
return status;
READ_BUF(16);
READ64(locku->lu_offset);
READ64(locku->lu_length);
DECODE_TAIL;
}
static __be32
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 __be32
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:
status = nfsd4_decode_fattr(argp, open->op_bmval,
&open->op_iattr, &open->op_acl);
if (status)
goto out;
break;
case NFS4_CREATE_EXCLUSIVE:
READ_BUF(8);
COPYMEM(open->op_verf.data, 8);
break;
case NFS4_CREATE_EXCLUSIVE4_1:
if (argp->minorversion < 1)
goto xdr_error;
READ_BUF(8);
COPYMEM(open->op_verf.data, 8);
status = nfsd4_decode_fattr(argp, open->op_bmval,
&open->op_iattr, &open->op_acl);
if (status)
goto out;
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:
status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
if (status)
return status;
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;
default:
goto xdr_error;
}
DECODE_TAIL;
}
static __be32
nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
{
DECODE_HEAD;
open_conf->oc_stateowner = NULL;
status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
if (status)
return status;
READ_BUF(4);
READ32(open_conf->oc_seqid);
DECODE_TAIL;
}
static __be32
nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
{
DECODE_HEAD;
open_down->od_stateowner = NULL;
status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
if (status)
return status;
READ_BUF(12);
READ32(open_down->od_seqid);
READ32(open_down->od_share_access);
READ32(open_down->od_share_deny);
DECODE_TAIL;
}
static __be32
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 __be32
nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
{
DECODE_HEAD;
status = nfsd4_decode_stateid(argp, &read->rd_stateid);
if (status)
return status;
READ_BUF(12);
READ64(read->rd_offset);
READ32(read->rd_length);
DECODE_TAIL;
}
static __be32
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 __be32
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 __be32
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 __be32
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 __be32
nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
struct nfsd4_secinfo *secinfo)
{
DECODE_HEAD;
READ_BUF(4);
READ32(secinfo->si_namelen);
READ_BUF(secinfo->si_namelen);
SAVEMEM(secinfo->si_name, secinfo->si_namelen);
status = check_filename(secinfo->si_name, secinfo->si_namelen,
nfserr_noent);
if (status)
return status;
DECODE_TAIL;
}
static __be32
nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
{
__be32 status;
status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
if (status)
return status;
return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
&setattr->sa_acl);
}
static __be32
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 __be32
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 __be32
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 __be32
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
{
int avail;
int v;
int len;
DECODE_HEAD;
status = nfsd4_decode_stateid(argp, &write->wr_stateid);
if (status)
return status;
READ_BUF(16);
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) {
dprintk("NFSD: xdr error (%s:%d)\n",
__FILE__, __LINE__);
goto xdr_error;
}
argp->rqstp->rq_vec[0].iov_base = p;
argp->rqstp->rq_vec[0].iov_len = avail;
v = 0;
len = write->wr_buflen;
while (len > argp->rqstp->rq_vec[v].iov_len) {
len -= argp->rqstp->rq_vec[v].iov_len;
v++;
argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
argp->pagelist++;
if (argp->pagelen >= PAGE_SIZE) {
argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
argp->pagelen -= PAGE_SIZE;
} else {
argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
argp->pagelen -= len;
}
}
argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
argp->rqstp->rq_vec[v].iov_len = len;
write->wr_vlen = v+1;
DECODE_TAIL;
}
static __be32
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);
if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
return nfserr_inval;
DECODE_TAIL;
}
static __be32
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
nfsd41: exchange_id operation Implement the exchange_id operation confoming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-28 Based on the client provided name, hash a client id. If a confirmed one is found, compare the op's creds and verifier. If the creds match and the verifier is different then expire the old client (client re-incarnated), otherwise, if both match, assume it's a replay and ignore it. If an unconfirmed client is found, then copy the new creds and verifer if need update, otherwise assume replay. The client is moved to a confirmed state on create_session. In the nfs41 branch set the exchange_id flags to EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_SUPP_MOVED_REFER (pNFS is not supported, Referrals are supported, Migration is not.). Address various scenarios from section 18.35 of the spec: 1. Check for EXCHGID4_FLAG_UPD_CONFIRMED_REC_A and set EXCHGID4_FLAG_CONFIRMED_R as appropriate. 2. Return error codes per 18.35.4 scenarios. 3. Update client records or generate new client ids depending on scenario. Note: 18.35.4 case 3 probably still needs revisiting. The handling seems not quite right. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamosn <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: use utsname for major_id (and copy to server_scope)] [nfsd41: fix handling of various exchange id scenarios] Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: reverse use of EXCHGID4_INVAL_FLAG_MASK_A] [simplify nfsd4_encode_exchange_id error handling] [nfsd41: embed an xdr_netobj in nfsd4_exchange_id] [nfsd41: return nfserr_serverfault for spa_how == SP4_MACH_CRED] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-04-03 07:28:01 +02:00
struct nfsd4_exchange_id *exid)
{
nfsd41: exchange_id operation Implement the exchange_id operation confoming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-28 Based on the client provided name, hash a client id. If a confirmed one is found, compare the op's creds and verifier. If the creds match and the verifier is different then expire the old client (client re-incarnated), otherwise, if both match, assume it's a replay and ignore it. If an unconfirmed client is found, then copy the new creds and verifer if need update, otherwise assume replay. The client is moved to a confirmed state on create_session. In the nfs41 branch set the exchange_id flags to EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_SUPP_MOVED_REFER (pNFS is not supported, Referrals are supported, Migration is not.). Address various scenarios from section 18.35 of the spec: 1. Check for EXCHGID4_FLAG_UPD_CONFIRMED_REC_A and set EXCHGID4_FLAG_CONFIRMED_R as appropriate. 2. Return error codes per 18.35.4 scenarios. 3. Update client records or generate new client ids depending on scenario. Note: 18.35.4 case 3 probably still needs revisiting. The handling seems not quite right. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamosn <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: use utsname for major_id (and copy to server_scope)] [nfsd41: fix handling of various exchange id scenarios] Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: reverse use of EXCHGID4_INVAL_FLAG_MASK_A] [simplify nfsd4_encode_exchange_id error handling] [nfsd41: embed an xdr_netobj in nfsd4_exchange_id] [nfsd41: return nfserr_serverfault for spa_how == SP4_MACH_CRED] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-04-03 07:28:01 +02:00
int dummy;
DECODE_HEAD;
READ_BUF(NFS4_VERIFIER_SIZE);
COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
READ_BUF(4);
READ32(exid->clname.len);
READ_BUF(exid->clname.len);
SAVEMEM(exid->clname.data, exid->clname.len);
READ_BUF(4);
READ32(exid->flags);
/* Ignore state_protect4_a */
READ_BUF(4);
READ32(exid->spa_how);
switch (exid->spa_how) {
case SP4_NONE:
break;
case SP4_MACH_CRED:
/* spo_must_enforce */
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy * 4);
p += dummy;
/* spo_must_allow */
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy * 4);
p += dummy;
break;
case SP4_SSV:
/* ssp_ops */
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy * 4);
p += dummy;
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy * 4);
p += dummy;
/* ssp_hash_algs<> */
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy);
p += XDR_QUADLEN(dummy);
/* ssp_encr_algs<> */
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy);
p += XDR_QUADLEN(dummy);
/* ssp_window and ssp_num_gss_handles */
READ_BUF(8);
READ32(dummy);
READ32(dummy);
break;
default:
goto xdr_error;
}
/* Ignore Implementation ID */
READ_BUF(4); /* nfs_impl_id4 array length */
READ32(dummy);
if (dummy > 1)
goto xdr_error;
if (dummy == 1) {
/* nii_domain */
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy);
p += XDR_QUADLEN(dummy);
/* nii_name */
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy);
p += XDR_QUADLEN(dummy);
/* nii_date */
READ_BUF(12);
p += 3;
}
DECODE_TAIL;
}
static __be32
nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
struct nfsd4_create_session *sess)
{
nfsd41: create_session operation Implement the create_session operation confoming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Look up the client id (generated by the server on exchange_id, given by the client on create_session). If neither a confirmed or unconfirmed client is found then the client id is stale If a confirmed cilent is found (i.e. we already received create_session for it) then compare the sequence id to determine if it's a replay or possibly a mis-ordered rpc. If the seqid is in order, update the confirmed client seqid and procedd with updating the session parameters. If an unconfirmed client_id is found then verify the creds and seqid. If both match move the client id to confirmed state and proceed with processing the create_session. Currently, we do not support persistent sessions, and RDMA. alloc_init_session generates a new sessionid and creates a session structure. NFSD_PAGES_PER_SLOT is used for the max response cached calculation, and for the counting of DRC pages using the hard limits set in struct srv_serv. A note on NFSD_PAGES_PER_SLOT: Other patches in this series allow for NFSD_PAGES_PER_SLOT + 1 pages to be cached in a DRC slot when the response size is less than NFSD_PAGES_PER_SLOT * PAGE_SIZE but xdr_buf pages are used. e.g. a READDIR operation will encode a small amount of data in the xdr_buf head, and then the READDIR in the xdr_buf pages. So, the hard limit calculation use of pages by a session is underestimated by the number of cached operations using the xdr_buf pages. Yet another patch caches no pages for the solo sequence operation, or any compound where cache_this is False. So the hard limit calculation use of pages by a session is overestimated by the number of these operations in the cache. TODO: improve resource pre-allocation and negotiate session parameters accordingly. Respect and possibly adjust backchannel attributes. Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> [nfsd41: remove headerpadsz from channel attributes] Our client and server only support a headerpadsz of 0. [nfsd41: use DRC limits in fore channel init] [nfsd41: do not change CREATE_SESSION back channel attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [use sessionid_lock spin lock] [nfsd41: use bool inuse for slot state] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41 remove sl_session from alloc_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [simplify nfsd4_encode_create_session error handling] [nfsd41: fix comment style in init_forechannel_attrs] [nfsd41: allocate struct nfsd4_session and slot table in one piece] [nfsd41: no need to INIT_LIST_HEAD in alloc_init_session just prior to list_add] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-04-03 07:28:28 +02:00
DECODE_HEAD;
u32 dummy;
char *machine_name;
int i;
int nr_secflavs;
READ_BUF(16);
COPYMEM(&sess->clientid, 8);
READ32(sess->seqid);
READ32(sess->flags);
/* Fore channel attrs */
READ_BUF(28);
READ32(dummy); /* headerpadsz is always 0 */
READ32(sess->fore_channel.maxreq_sz);
READ32(sess->fore_channel.maxresp_sz);
READ32(sess->fore_channel.maxresp_cached);
READ32(sess->fore_channel.maxops);
READ32(sess->fore_channel.maxreqs);
READ32(sess->fore_channel.nr_rdma_attrs);
if (sess->fore_channel.nr_rdma_attrs == 1) {
READ_BUF(4);
READ32(sess->fore_channel.rdma_attrs);
} else if (sess->fore_channel.nr_rdma_attrs > 1) {
dprintk("Too many fore channel attr bitmaps!\n");
goto xdr_error;
}
/* Back channel attrs */
READ_BUF(28);
READ32(dummy); /* headerpadsz is always 0 */
READ32(sess->back_channel.maxreq_sz);
READ32(sess->back_channel.maxresp_sz);
READ32(sess->back_channel.maxresp_cached);
READ32(sess->back_channel.maxops);
READ32(sess->back_channel.maxreqs);
READ32(sess->back_channel.nr_rdma_attrs);
if (sess->back_channel.nr_rdma_attrs == 1) {
READ_BUF(4);
READ32(sess->back_channel.rdma_attrs);
} else if (sess->back_channel.nr_rdma_attrs > 1) {
dprintk("Too many back channel attr bitmaps!\n");
goto xdr_error;
}
READ_BUF(8);
READ32(sess->callback_prog);
/* callback_sec_params4 */
READ32(nr_secflavs);
for (i = 0; i < nr_secflavs; ++i) {
READ_BUF(4);
READ32(dummy);
switch (dummy) {
case RPC_AUTH_NULL:
/* Nothing to read */
break;
case RPC_AUTH_UNIX:
READ_BUF(8);
/* stamp */
READ32(dummy);
/* machine name */
READ32(dummy);
READ_BUF(dummy);
SAVEMEM(machine_name, dummy);
/* uid, gid */
READ_BUF(8);
READ32(sess->uid);
READ32(sess->gid);
/* more gids */
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy * 4);
for (i = 0; i < dummy; ++i)
READ32(dummy);
break;
case RPC_AUTH_GSS:
dprintk("RPC_AUTH_GSS callback secflavor "
"not supported!\n");
READ_BUF(8);
/* gcbp_service */
READ32(dummy);
/* gcbp_handle_from_server */
READ32(dummy);
READ_BUF(dummy);
p += XDR_QUADLEN(dummy);
/* gcbp_handle_from_client */
READ_BUF(4);
READ32(dummy);
READ_BUF(dummy);
p += XDR_QUADLEN(dummy);
break;
default:
dprintk("Illegal callback secflavor\n");
return nfserr_inval;
}
}
DECODE_TAIL;
}
static __be32
nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
struct nfsd4_destroy_session *destroy_session)
{
DECODE_HEAD;
READ_BUF(NFS4_MAX_SESSIONID_LEN);
COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
DECODE_TAIL;
}
static __be32
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
struct nfsd4_sequence *seq)
{
DECODE_HEAD;
READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
READ32(seq->seqid);
READ32(seq->slotid);
READ32(seq->maxslots);
READ32(seq->cachethis);
DECODE_TAIL;
}
static __be32
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
{
return nfs_ok;
}
static __be32
nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
{
return nfserr_notsupp;
}
typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
static nfsd4_dec nfsd4_dec_ops[] = {
[OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
[OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
[OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
[OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
[OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
[OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
[OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
[OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
[OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
[OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
[OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
[OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
[OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
[OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
[OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
[OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
[OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
[OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
[OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
[OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
[OP_READ] = (nfsd4_dec)nfsd4_decode_read,
[OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
[OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
[OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
[OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
[OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
[OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
[OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
[OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
[OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
[OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
[OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
[OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
[OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
[OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
};
static nfsd4_dec nfsd41_dec_ops[] = {
[OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
[OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
[OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
[OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
[OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
[OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
[OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
[OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
[OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
[OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
[OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
[OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
[OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
[OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
[OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
[OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
[OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
[OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
[OP_READ] = (nfsd4_dec)nfsd4_decode_read,
[OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
[OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
[OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
[OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
[OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
[OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
[OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
[OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
[OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
[OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
[OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
[OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
/* new operations for NFSv4.1 */
[OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
[OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
[OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
[OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
[OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
[OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
[OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp,
};
struct nfsd4_minorversion_ops {
nfsd4_dec *decoders;
int nops;
};
static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
[0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
[1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
};
static __be32
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
{
DECODE_HEAD;
struct nfsd4_op *op;
struct nfsd4_minorversion_ops *ops;
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;
dprintk("nfsd: couldn't allocate room for COMPOUND\n");
goto xdr_error;
}
}
if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
argp->opcnt = 0;
ops = &nfsd4_minorversion[argp->minorversion];
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++);
if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
op->status = ops->decoders[op->opnum](argp, &op->u);
else {
op->opnum = OP_ILLEGAL;
op->status = nfserr_op_illegal;
}
if (op->status) {
argp->opcnt = i+1;
break;
}
}
DECODE_TAIL;
}
#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 { if (nbytes > 0) { \
*(p + XDR_QUADLEN(nbytes) -1) = 0; \
memcpy(p, ptr, nbytes); \
p += XDR_QUADLEN(nbytes); \
}} while (0)
static void write32(__be32 **p, u32 n)
{
*(*p)++ = n;
}
static void write64(__be32 **p, u64 n)
{
write32(p, (u32)(n >> 32));
write32(p, (u32)n);
}
static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
{
if (IS_I_VERSION(inode)) {
write64(p, inode->i_version);
} else {
write32(p, stat->ctime.tv_sec);
write32(p, stat->ctime.tv_nsec);
}
}
static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
{
write32(p, c->atomic);
if (c->change_supported) {
write64(p, c->before_change);
write64(p, c->after_change);
} else {
write32(p, c->before_ctime_sec);
write32(p, c->before_ctime_nsec);
write32(p, c->after_ctime_sec);
write32(p, c->after_ctime_nsec);
}
}
#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 \
__be32 *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) { \
[PATCH] nfsd4: fix open_reclaim seqid The sequence number we store in the sequence id is the last one we received from the client. So on the next operation we'll check that the client gives us the next higher number. We increment sequence id's at the last moment, in encode, so that we're sure of knowing the right error return. (The decision to increment the sequence id depends on the exact error returned.) However on the *first* use of a sequence number, if we set the sequence number to the one received from the client and then let the increment happen on encode, we'll be left with a sequence number one to high. For that reason, ENCODE_SEQID_OP_TAIL only increments the sequence id on *confirmed* stateowners. This creates a problem for open reclaims, which are confirmed on first use. Therefore the open reclaim code, as a special exception, *decrements* the sequence id, cancelling out the undesired increment on encode. But this prevents the sequence id from ever being incremented in the case where multiple reclaims are sent with the same openowner. Yuch! We could add another exception to the open reclaim code, decrementing the sequence id only if this is the first use of the open owner. But it's simpler by far to modify the meaning of the op_seqid field: instead of representing the previous value sent by the client, we take op_seqid, after encoding, to represent the *next* sequence id that we expect from the client. This eliminates the need for special-case handling of the first use of a stateowner. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-08 02:59:19 +02:00
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);
/* Encode as an array of strings the string given with components
* seperated @sep.
*/
static __be32 nfsd4_encode_components(char sep, char *components,
__be32 **pp, int *buflen)
{
__be32 *p = *pp;
__be32 *countp = p;
int strlen, count=0;
char *str, *end;
dprintk("nfsd4_encode_components(%s)\n", components);
if ((*buflen -= 4) < 0)
return nfserr_resource;
WRITE32(0); /* We will fill this in with @count later */
end = str = components;
while (*end) {
for (; *end && (*end != sep); end++)
; /* Point to end of component */
strlen = end - str;
if (strlen) {
if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
return nfserr_resource;
WRITE32(strlen);
WRITEMEM(str, strlen);
count++;
}
else
end++;
str = end;
}
*pp = p;
p = countp;
WRITE32(count);
return 0;
}
/*
* encode a location element of a fs_locations structure
*/
static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
__be32 **pp, int *buflen)
{
__be32 status;
__be32 *p = *pp;
status = nfsd4_encode_components(':', location->hosts, &p, buflen);
if (status)
return status;
status = nfsd4_encode_components('/', location->path, &p, buflen);
if (status)
return status;
*pp = p;
return 0;
}
/*
* Return the path to an export point in the pseudo filesystem namespace
* Returned string is safe to use as long as the caller holds a reference
* to @exp.
*/
static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
{
struct svc_fh tmp_fh;
char *path, *rootpath;
fh_init(&tmp_fh, NFS4_FHSIZE);
*stat = exp_pseudoroot(rqstp, &tmp_fh);
if (*stat)
return NULL;
rootpath = tmp_fh.fh_export->ex_pathname;
path = exp->ex_pathname;
if (strncmp(path, rootpath, strlen(rootpath))) {
dprintk("nfsd: fs_locations failed;"
"%s is not contained in %s\n", path, rootpath);
*stat = nfserr_notsupp;
return NULL;
}
return path + strlen(rootpath);
}
/*
* encode a fs_locations structure
*/
static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
struct svc_export *exp,
__be32 **pp, int *buflen)
{
__be32 status;
int i;
__be32 *p = *pp;
struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
char *root = nfsd4_path(rqstp, exp, &status);
if (status)
return status;
status = nfsd4_encode_components('/', root, &p, buflen);
if (status)
return status;
if ((*buflen -= 4) < 0)
return nfserr_resource;
WRITE32(fslocs->locations_count);
for (i=0; i<fslocs->locations_count; i++) {
status = nfsd4_encode_fs_location4(&fslocs->locations[i],
&p, buflen);
if (status)
return status;
}
*pp = p;
return 0;
}
static u32 nfs4_ftypes[16] = {
NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
NF4DIR, NF4BAD, NF4BLK, NF4BAD,
NF4REG, NF4BAD, NF4LNK, NF4BAD,
NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
};
static __be32
nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
__be32 **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 __be32
nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
{
return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
}
static inline __be32
nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
{
return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
}
static inline __be32
nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
__be32 **p, int *buflen)
{
return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
}
#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
FATTR4_WORD0_RDATTR_ERROR)
#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
{
/* As per referral draft: */
if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
*bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
*bmval0 & FATTR4_WORD0_FS_LOCATIONS)
*rdattr_err = NFSERR_MOVED;
else
return nfserr_moved;
}
*bmval0 &= WORD0_ABSENT_FS_ATTRS;
*bmval1 &= WORD1_ABSENT_FS_ATTRS;
return 0;
}
/*
* 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.
*/
__be32
nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
nfsd: Allow AIX client to read dir containing mountpoints This patch addresses a compatibility issue with a Linux NFS server and AIX NFS client. I have exported /export as fsid=0 with sec=krb5:krb5i I have mount --bind /home onto /export/home I have exported /export/home with sec=krb5i The AIX client mounts / -o sec=krb5:krb5i onto /mnt If I do an ls /mnt, the AIX client gets a permission error. Looking at the network traceIwe see a READDIR looking for attributes FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID. The response gives a NFS4ERR_WRONGSEC which the AIX client is not expecting. Since the AIX client is only asking for an attribute that is an attribute of the parent file system (pseudo root in my example), it seems reasonable that there should not be an error. In discussing this issue with Bruce Fields, I initially proposed ignoring the error in nfsd4_encode_dirent_fattr() if all that was being asked for was FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID, however, Bruce suggested that we avoid calling cross_mnt() if only these attributes are requested. The following patch implements bypassing cross_mnt() if only FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID are called. Since there is some complexity in the code in nfsd4_encode_fattr(), I didn't want to duplicate code (and introduce a maintenance nightmare), so I added a parameter to nfsd4_encode_fattr() that indicates whether it should ignore cross mounts and simply fill in the attribute using the passed in dentry as opposed to it's parent. Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-11-27 20:34:05 +01:00
struct svc_rqst *rqstp, int ignore_crossmnt)
{
u32 bmval0 = bmval[0];
u32 bmval1 = bmval[1];
u32 bmval2 = bmval[2];
struct kstat stat;
struct svc_fh tempfh;
struct kstatfs statfs;
int buflen = *countp << 2;
__be32 *attrlenp;
u32 dummy;
u64 dummy64;
u32 rdattr_err = 0;
__be32 *p = buffer;
__be32 status;
int err;
int aclsupport = 0;
struct nfs4_acl *acl = NULL;
struct nfsd4_compoundres *resp = rqstp->rq_resp;
u32 minorversion = resp->cstate.minorversion;
BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
if (exp->ex_fslocs.migrated) {
BUG_ON(bmval[2]);
status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
if (status)
goto out;
}
err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
if (err)
goto out_nfserr;
if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
FATTR4_WORD0_MAXNAME)) ||
(bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
FATTR4_WORD1_SPACE_TOTAL))) {
err = vfs_statfs(dentry, &statfs);
if (err)
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)) {
err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
aclsupport = (err == 0);
if (bmval0 & FATTR4_WORD0_ACL) {
if (err == -EOPNOTSUPP)
bmval0 &= ~FATTR4_WORD0_ACL;
else if (err == -EINVAL) {
status = nfserr_attrnotsupp;
goto out;
} else if (err != 0)
goto out_nfserr;
}
}
if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
if (exp->ex_fslocs.locations == NULL) {
bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
}
}
if ((buflen -= 16) < 0)
goto out_resource;
if (unlikely(bmval2)) {
WRITE32(3);
WRITE32(bmval0);
WRITE32(bmval1);
WRITE32(bmval2);
} else if (likely(bmval1)) {
WRITE32(2);
WRITE32(bmval0);
WRITE32(bmval1);
} else {
WRITE32(1);
WRITE32(bmval0);
}
attrlenp = p++; /* to be backfilled later */
if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
u32 word0 = nfsd_suppattrs0(minorversion);
u32 word1 = nfsd_suppattrs1(minorversion);
u32 word2 = nfsd_suppattrs2(minorversion);
if ((buflen -= 12) < 0)
goto out_resource;
if (!aclsupport)
word0 &= ~FATTR4_WORD0_ACL;
if (!exp->ex_fslocs.locations)
word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
if (!word2) {
WRITE32(2);
WRITE32(word0);
WRITE32(word1);
} else {
WRITE32(3);
WRITE32(word0);
WRITE32(word1);
WRITE32(word2);
}
}
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) {
if ((buflen -= 8) < 0)
goto out_resource;
write_change(&p, &stat, dentry->d_inode);
}
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 (exp->ex_fslocs.migrated) {
WRITE64(NFS4_REFERRAL_FSID_MAJOR);
WRITE64(NFS4_REFERRAL_FSID_MINOR);
} else switch(fsid_source(fhp)) {
case FSIDSOURCE_FSID:
WRITE64((u64)exp->ex_fsid);
WRITE64((u64)0);
break;
case FSIDSOURCE_DEV:
WRITE32(0);
WRITE32(MAJOR(stat.dev));
WRITE32(0);
WRITE32(MINOR(stat.dev));
break;
case FSIDSOURCE_UUID:
WRITEMEM(exp->ex_uuid, 16);
break;
}
}
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(rdattr_err);
}
if (bmval0 & FATTR4_WORD0_ACL) {
struct nfs4_ace *ace;
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);
for (ace = acl->aces; ace < acl->aces + acl->naces; 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(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_FS_LOCATIONS) {
status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
if (status == nfserr_resource)
goto out_resource;
if (status)
goto out;
}
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(statfs.f_namelen);
}
if (bmval0 & FATTR4_WORD0_MAXREAD) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64((u64) svc_max_payload(rqstp));
}
if (bmval0 & FATTR4_WORD0_MAXWRITE) {
if ((buflen -= 8) < 0)
goto out_resource;
WRITE64((u64) svc_max_payload(rqstp));
}
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) {
if ((buflen -= 8) < 0)
goto out_resource;
nfsd: Allow AIX client to read dir containing mountpoints This patch addresses a compatibility issue with a Linux NFS server and AIX NFS client. I have exported /export as fsid=0 with sec=krb5:krb5i I have mount --bind /home onto /export/home I have exported /export/home with sec=krb5i The AIX client mounts / -o sec=krb5:krb5i onto /mnt If I do an ls /mnt, the AIX client gets a permission error. Looking at the network traceIwe see a READDIR looking for attributes FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID. The response gives a NFS4ERR_WRONGSEC which the AIX client is not expecting. Since the AIX client is only asking for an attribute that is an attribute of the parent file system (pseudo root in my example), it seems reasonable that there should not be an error. In discussing this issue with Bruce Fields, I initially proposed ignoring the error in nfsd4_encode_dirent_fattr() if all that was being asked for was FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID, however, Bruce suggested that we avoid calling cross_mnt() if only these attributes are requested. The following patch implements bypassing cross_mnt() if only FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID are called. Since there is some complexity in the code in nfsd4_encode_fattr(), I didn't want to duplicate code (and introduce a maintenance nightmare), so I added a parameter to nfsd4_encode_fattr() that indicates whether it should ignore cross mounts and simply fill in the attribute using the passed in dentry as opposed to it's parent. Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-11-27 20:34:05 +01:00
/*
* Get parent's attributes if not ignoring crossmount
* and this is the root of a cross-mounted filesystem.
*/
if (ignore_crossmnt == 0 &&
exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
exp->ex_path.mnt->mnt_mountpoint, &stat);
if (err)
goto out_nfserr;
}
WRITE64(stat.ino);
}
if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
WRITE32(3);
WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
}
*attrlenp = htonl((char *)p - (char *)attrlenp - 4);
*countp = p - buffer;
status = nfs_ok;
out:
kfree(acl);
if (fhp == &tempfh)
fh_put(&tempfh);
return status;
out_nfserr:
status = nfserrno(err);
goto out;
out_resource:
*countp = 0;
status = nfserr_resource;
goto out;
out_serverfault:
status = nfserr_serverfault;
goto out;
}
static inline int attributes_need_mount(u32 *bmval)
{
if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
return 1;
if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
return 1;
return 0;
}
static __be32
nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
const char *name, int namlen, __be32 *p, int *buflen)
{
struct svc_export *exp = cd->rd_fhp->fh_export;
struct dentry *dentry;
__be32 nfserr;
nfsd: Allow AIX client to read dir containing mountpoints This patch addresses a compatibility issue with a Linux NFS server and AIX NFS client. I have exported /export as fsid=0 with sec=krb5:krb5i I have mount --bind /home onto /export/home I have exported /export/home with sec=krb5i The AIX client mounts / -o sec=krb5:krb5i onto /mnt If I do an ls /mnt, the AIX client gets a permission error. Looking at the network traceIwe see a READDIR looking for attributes FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID. The response gives a NFS4ERR_WRONGSEC which the AIX client is not expecting. Since the AIX client is only asking for an attribute that is an attribute of the parent file system (pseudo root in my example), it seems reasonable that there should not be an error. In discussing this issue with Bruce Fields, I initially proposed ignoring the error in nfsd4_encode_dirent_fattr() if all that was being asked for was FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID, however, Bruce suggested that we avoid calling cross_mnt() if only these attributes are requested. The following patch implements bypassing cross_mnt() if only FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID are called. Since there is some complexity in the code in nfsd4_encode_fattr(), I didn't want to duplicate code (and introduce a maintenance nightmare), so I added a parameter to nfsd4_encode_fattr() that indicates whether it should ignore cross mounts and simply fill in the attribute using the passed in dentry as opposed to it's parent. Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-11-27 20:34:05 +01:00
int ignore_crossmnt = 0;
dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
if (IS_ERR(dentry))
return nfserrno(PTR_ERR(dentry));
if (!dentry->d_inode) {
/*
* nfsd_buffered_readdir drops the i_mutex between
* readdir and calling this callback, leaving a window
* where this directory entry could have gone away.
*/
dput(dentry);
return nfserr_noent;
}
exp_get(exp);
nfsd: Allow AIX client to read dir containing mountpoints This patch addresses a compatibility issue with a Linux NFS server and AIX NFS client. I have exported /export as fsid=0 with sec=krb5:krb5i I have mount --bind /home onto /export/home I have exported /export/home with sec=krb5i The AIX client mounts / -o sec=krb5:krb5i onto /mnt If I do an ls /mnt, the AIX client gets a permission error. Looking at the network traceIwe see a READDIR looking for attributes FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID. The response gives a NFS4ERR_WRONGSEC which the AIX client is not expecting. Since the AIX client is only asking for an attribute that is an attribute of the parent file system (pseudo root in my example), it seems reasonable that there should not be an error. In discussing this issue with Bruce Fields, I initially proposed ignoring the error in nfsd4_encode_dirent_fattr() if all that was being asked for was FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID, however, Bruce suggested that we avoid calling cross_mnt() if only these attributes are requested. The following patch implements bypassing cross_mnt() if only FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID are called. Since there is some complexity in the code in nfsd4_encode_fattr(), I didn't want to duplicate code (and introduce a maintenance nightmare), so I added a parameter to nfsd4_encode_fattr() that indicates whether it should ignore cross mounts and simply fill in the attribute using the passed in dentry as opposed to it's parent. Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-11-27 20:34:05 +01:00
/*
* In the case of a mountpoint, the client may be asking for
* attributes that are only properties of the underlying filesystem
* as opposed to the cross-mounted file system. In such a case,
* we will not follow the cross mount and will fill the attribtutes
* directly from the mountpoint dentry.
*/
if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
nfsd: Allow AIX client to read dir containing mountpoints This patch addresses a compatibility issue with a Linux NFS server and AIX NFS client. I have exported /export as fsid=0 with sec=krb5:krb5i I have mount --bind /home onto /export/home I have exported /export/home with sec=krb5i The AIX client mounts / -o sec=krb5:krb5i onto /mnt If I do an ls /mnt, the AIX client gets a permission error. Looking at the network traceIwe see a READDIR looking for attributes FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID. The response gives a NFS4ERR_WRONGSEC which the AIX client is not expecting. Since the AIX client is only asking for an attribute that is an attribute of the parent file system (pseudo root in my example), it seems reasonable that there should not be an error. In discussing this issue with Bruce Fields, I initially proposed ignoring the error in nfsd4_encode_dirent_fattr() if all that was being asked for was FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID, however, Bruce suggested that we avoid calling cross_mnt() if only these attributes are requested. The following patch implements bypassing cross_mnt() if only FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID are called. Since there is some complexity in the code in nfsd4_encode_fattr(), I didn't want to duplicate code (and introduce a maintenance nightmare), so I added a parameter to nfsd4_encode_fattr() that indicates whether it should ignore cross mounts and simply fill in the attribute using the passed in dentry as opposed to it's parent. Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-11-27 20:34:05 +01:00
ignore_crossmnt = 1;
else if (d_mountpoint(dentry)) {
int err;
/*
* Why the heck aren't we just using nfsd_lookup??
* Different "."/".." handling? Something else?
* At least, add a comment here to explain....
*/
err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
if (err) {
nfserr = nfserrno(err);
goto out_put;
}
nfserr = check_nfsd_access(exp, cd->rd_rqstp);
if (nfserr)
goto out_put;
}
nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
nfsd: Allow AIX client to read dir containing mountpoints This patch addresses a compatibility issue with a Linux NFS server and AIX NFS client. I have exported /export as fsid=0 with sec=krb5:krb5i I have mount --bind /home onto /export/home I have exported /export/home with sec=krb5i The AIX client mounts / -o sec=krb5:krb5i onto /mnt If I do an ls /mnt, the AIX client gets a permission error. Looking at the network traceIwe see a READDIR looking for attributes FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID. The response gives a NFS4ERR_WRONGSEC which the AIX client is not expecting. Since the AIX client is only asking for an attribute that is an attribute of the parent file system (pseudo root in my example), it seems reasonable that there should not be an error. In discussing this issue with Bruce Fields, I initially proposed ignoring the error in nfsd4_encode_dirent_fattr() if all that was being asked for was FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID, however, Bruce suggested that we avoid calling cross_mnt() if only these attributes are requested. The following patch implements bypassing cross_mnt() if only FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID are called. Since there is some complexity in the code in nfsd4_encode_fattr(), I didn't want to duplicate code (and introduce a maintenance nightmare), so I added a parameter to nfsd4_encode_fattr() that indicates whether it should ignore cross mounts and simply fill in the attribute using the passed in dentry as opposed to it's parent. Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-11-27 20:34:05 +01:00
cd->rd_rqstp, ignore_crossmnt);
out_put:
dput(dentry);
exp_put(exp);
return nfserr;
}
static __be32 *
nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
{
__be32 *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(void *ccdv, const char *name, int namlen,
loff_t offset, u64 ino, unsigned int d_type)
{
struct readdir_cd *ccd = ccdv;
struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
int buflen;
__be32 *p = cd->buffer;
__be32 *cookiep;
__be32 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 */
cookiep = p;
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;
case nfserr_noent:
goto skip_entry;
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->offset = cookiep;
skip_entry:
cd->common.err = nfs_ok;
return 0;
fail:
cd->common.err = nfserr;
return -EINVAL;
}
static void
nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
{
__be32 *p;
RESERVE_SPACE(sizeof(stateid_t));
WRITE32(sid->si_generation);
WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
ADJUST_ARGS();
}
static __be32
nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
{
__be32 *p;
if (!nfserr) {
RESERVE_SPACE(8);
WRITE32(access->ac_supported);
WRITE32(access->ac_resp_access);
ADJUST_ARGS();
}
return nfserr;
}
static __be32
nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr)
nfsd4_encode_stateid(resp, &close->cl_stateid);
ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
return nfserr;
}
static __be32
nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
{
__be32 *p;
if (!nfserr) {
RESERVE_SPACE(8);
WRITEMEM(commit->co_verf.data, 8);
ADJUST_ARGS();
}
return nfserr;
}
static __be32
nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
{
__be32 *p;
if (!nfserr) {
RESERVE_SPACE(32);
write_cinfo(&p, &create->cr_cinfo);
WRITE32(2);
WRITE32(create->cr_bmval[0]);
WRITE32(create->cr_bmval[1]);
ADJUST_ARGS();
}
return nfserr;
}
static __be32
nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 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,
nfsd: Allow AIX client to read dir containing mountpoints This patch addresses a compatibility issue with a Linux NFS server and AIX NFS client. I have exported /export as fsid=0 with sec=krb5:krb5i I have mount --bind /home onto /export/home I have exported /export/home with sec=krb5i The AIX client mounts / -o sec=krb5:krb5i onto /mnt If I do an ls /mnt, the AIX client gets a permission error. Looking at the network traceIwe see a READDIR looking for attributes FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID. The response gives a NFS4ERR_WRONGSEC which the AIX client is not expecting. Since the AIX client is only asking for an attribute that is an attribute of the parent file system (pseudo root in my example), it seems reasonable that there should not be an error. In discussing this issue with Bruce Fields, I initially proposed ignoring the error in nfsd4_encode_dirent_fattr() if all that was being asked for was FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID, however, Bruce suggested that we avoid calling cross_mnt() if only these attributes are requested. The following patch implements bypassing cross_mnt() if only FATTR4_RDATTR_ERROR and FATTR4_MOUNTED_ON_FILEID are called. Since there is some complexity in the code in nfsd4_encode_fattr(), I didn't want to duplicate code (and introduce a maintenance nightmare), so I added a parameter to nfsd4_encode_fattr() that indicates whether it should ignore cross mounts and simply fill in the attribute using the passed in dentry as opposed to it's parent. Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2007-11-27 20:34:05 +01:00
resp->rqstp, 0);
if (!nfserr)
resp->p += buflen;
return nfserr;
}
static __be32
nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
{
struct svc_fh *fhp = *fhpp;
unsigned int len;
__be32 *p;
if (!nfserr) {
len = fhp->fh_handle.fh_size;
RESERVE_SPACE(len + 4);
WRITE32(len);
WRITEMEM(&fhp->fh_handle.fh_base, len);
ADJUST_ARGS();
}
return nfserr;
}
/*
* 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)
{
__be32 *p;
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 __be32
nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr)
nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
else if (nfserr == nfserr_denied)
nfsd4_encode_lock_denied(resp, &lock->lk_denied);
ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
return nfserr;
}
static __be32
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
{
if (nfserr == nfserr_denied)
nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
return nfserr;
}
static __be32
nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr)
nfsd4_encode_stateid(resp, &locku->lu_stateid);
ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
return nfserr;
}
static __be32
nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
{
__be32 *p;
if (!nfserr) {
RESERVE_SPACE(20);
write_cinfo(&p, &link->li_cinfo);
ADJUST_ARGS();
}
return nfserr;
}
static __be32
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
{
__be32 *p;
ENCODE_SEQID_OP_HEAD;
if (nfserr)
goto out;
nfsd4_encode_stateid(resp, &open->op_stateid);
RESERVE_SPACE(40);
write_cinfo(&p, &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:
nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
RESERVE_SPACE(20);
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:
nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
RESERVE_SPACE(32);
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);
return nfserr;
}
static __be32
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr)
nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
return nfserr;
}
static __be32
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
{
ENCODE_SEQID_OP_HEAD;
if (!nfserr)
nfsd4_encode_stateid(resp, &od->od_stateid);
ENCODE_SEQID_OP_TAIL(od->od_stateowner);
return nfserr;
}
static __be32
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
struct nfsd4_read *read)
{
u32 eof;
int v, pn;
unsigned long maxcount;
long len;
__be32 *p;
if (nfserr)
return nfserr;
if (resp->xbuf->page_len)
return nfserr_resource;
RESERVE_SPACE(8); /* eof flag and byte count */
maxcount = svc_max_payload(resp->rqstp);
if (maxcount > read->rd_length)
maxcount = read->rd_length;
len = maxcount;
v = 0;
while (len > 0) {
pn = resp->rqstp->rq_resused++;
resp->rqstp->rq_vec[v].iov_base =
page_address(resp->rqstp->rq_respages[pn]);
resp->rqstp->rq_vec[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, resp->rqstp->rq_vec, 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 __be32
nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
{
int maxcount;
char *page;
__be32 *p;
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 __be32
nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
{
int maxcount;
loff_t offset;
__be32 *page, *savep, *tailbase;
__be32 *p;
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 __be32
nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
{
__be32 *p;
if (!nfserr) {
RESERVE_SPACE(20);
write_cinfo(&p, &remove->rm_cinfo);
ADJUST_ARGS();
}
return nfserr;
}
static __be32
nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
{
__be32 *p;
if (!nfserr) {
RESERVE_SPACE(40);
write_cinfo(&p, &rename->rn_sinfo);
write_cinfo(&p, &rename->rn_tinfo);
ADJUST_ARGS();
}
return nfserr;
}
static __be32
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
struct nfsd4_secinfo *secinfo)
{
int i = 0;
struct svc_export *exp = secinfo->si_exp;
u32 nflavs;
struct exp_flavor_info *flavs;
struct exp_flavor_info def_flavs[2];
__be32 *p;
if (nfserr)
goto out;
if (exp->ex_nflavors) {
flavs = exp->ex_flavors;
nflavs = exp->ex_nflavors;
} else { /* Handling of some defaults in absence of real secinfo: */
flavs = def_flavs;
if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
nflavs = 2;
flavs[0].pseudoflavor = RPC_AUTH_UNIX;
flavs[1].pseudoflavor = RPC_AUTH_NULL;
} else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
nflavs = 1;
flavs[0].pseudoflavor
= svcauth_gss_flavor(exp->ex_client);
} else {
nflavs = 1;
flavs[0].pseudoflavor
= exp->ex_client->flavour->flavour;
}
}
RESERVE_SPACE(4);
WRITE32(nflavs);
ADJUST_ARGS();
for (i = 0; i < nflavs; i++) {
u32 flav = flavs[i].pseudoflavor;
struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
if (gm) {
RESERVE_SPACE(4);
WRITE32(RPC_AUTH_GSS);
ADJUST_ARGS();
RESERVE_SPACE(4 + gm->gm_oid.len);
WRITE32(gm->gm_oid.len);
WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
ADJUST_ARGS();
RESERVE_SPACE(4);
WRITE32(0); /* qop */
ADJUST_ARGS();
RESERVE_SPACE(4);
WRITE32(gss_pseudoflavor_to_service(gm, flav));
ADJUST_ARGS();
gss_mech_put(gm);
} else {
RESERVE_SPACE(4);
WRITE32(flav);
ADJUST_ARGS();
}
}
out:
if (exp)
exp_put(exp);
return nfserr;
}
/*
* The SETATTR encode routine is special -- it always encodes a bitmap,
* regardless of the error status.
*/
static __be32
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
{
__be32 *p;
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();
return nfserr;
}
static __be32
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
{
__be32 *p;
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();
}
return nfserr;
}
static __be32
nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
{
__be32 *p;
if (!nfserr) {
RESERVE_SPACE(16);
WRITE32(write->wr_bytes_written);
WRITE32(write->wr_how_written);
WRITEMEM(write->wr_verifier.data, 8);
ADJUST_ARGS();
}
return nfserr;
}
static __be32
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
struct nfsd4_exchange_id *exid)
{
__be32 *p;
nfsd41: exchange_id operation Implement the exchange_id operation confoming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-28 Based on the client provided name, hash a client id. If a confirmed one is found, compare the op's creds and verifier. If the creds match and the verifier is different then expire the old client (client re-incarnated), otherwise, if both match, assume it's a replay and ignore it. If an unconfirmed client is found, then copy the new creds and verifer if need update, otherwise assume replay. The client is moved to a confirmed state on create_session. In the nfs41 branch set the exchange_id flags to EXCHGID4_FLAG_USE_NON_PNFS | EXCHGID4_FLAG_SUPP_MOVED_REFER (pNFS is not supported, Referrals are supported, Migration is not.). Address various scenarios from section 18.35 of the spec: 1. Check for EXCHGID4_FLAG_UPD_CONFIRMED_REC_A and set EXCHGID4_FLAG_CONFIRMED_R as appropriate. 2. Return error codes per 18.35.4 scenarios. 3. Update client records or generate new client ids depending on scenario. Note: 18.35.4 case 3 probably still needs revisiting. The handling seems not quite right. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamosn <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: use utsname for major_id (and copy to server_scope)] [nfsd41: fix handling of various exchange id scenarios] Signed-off-by: Mike Sager <sager@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41: reverse use of EXCHGID4_INVAL_FLAG_MASK_A] [simplify nfsd4_encode_exchange_id error handling] [nfsd41: embed an xdr_netobj in nfsd4_exchange_id] [nfsd41: return nfserr_serverfault for spa_how == SP4_MACH_CRED] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-04-03 07:28:01 +02:00
char *major_id;
char *server_scope;
int major_id_sz;
int server_scope_sz;
uint64_t minor_id = 0;
if (nfserr)
return nfserr;
major_id = utsname()->nodename;
major_id_sz = strlen(major_id);
server_scope = utsname()->nodename;
server_scope_sz = strlen(server_scope);
RESERVE_SPACE(
8 /* eir_clientid */ +
4 /* eir_sequenceid */ +
4 /* eir_flags */ +
4 /* spr_how (SP4_NONE) */ +
8 /* so_minor_id */ +
4 /* so_major_id.len */ +
(XDR_QUADLEN(major_id_sz) * 4) +
4 /* eir_server_scope.len */ +
(XDR_QUADLEN(server_scope_sz) * 4) +
4 /* eir_server_impl_id.count (0) */);
WRITEMEM(&exid->clientid, 8);
WRITE32(exid->seqid);
WRITE32(exid->flags);
/* state_protect4_r. Currently only support SP4_NONE */
BUG_ON(exid->spa_how != SP4_NONE);
WRITE32(exid->spa_how);
/* The server_owner struct */
WRITE64(minor_id); /* Minor id */
/* major id */
WRITE32(major_id_sz);
WRITEMEM(major_id, major_id_sz);
/* Server scope */
WRITE32(server_scope_sz);
WRITEMEM(server_scope, server_scope_sz);
/* Implementation id */
WRITE32(0); /* zero length nfs_impl_id4 array */
ADJUST_ARGS();
return 0;
}
static __be32
nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
struct nfsd4_create_session *sess)
{
__be32 *p;
nfsd41: create_session operation Implement the create_session operation confoming to http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26 Look up the client id (generated by the server on exchange_id, given by the client on create_session). If neither a confirmed or unconfirmed client is found then the client id is stale If a confirmed cilent is found (i.e. we already received create_session for it) then compare the sequence id to determine if it's a replay or possibly a mis-ordered rpc. If the seqid is in order, update the confirmed client seqid and procedd with updating the session parameters. If an unconfirmed client_id is found then verify the creds and seqid. If both match move the client id to confirmed state and proceed with processing the create_session. Currently, we do not support persistent sessions, and RDMA. alloc_init_session generates a new sessionid and creates a session structure. NFSD_PAGES_PER_SLOT is used for the max response cached calculation, and for the counting of DRC pages using the hard limits set in struct srv_serv. A note on NFSD_PAGES_PER_SLOT: Other patches in this series allow for NFSD_PAGES_PER_SLOT + 1 pages to be cached in a DRC slot when the response size is less than NFSD_PAGES_PER_SLOT * PAGE_SIZE but xdr_buf pages are used. e.g. a READDIR operation will encode a small amount of data in the xdr_buf head, and then the READDIR in the xdr_buf pages. So, the hard limit calculation use of pages by a session is underestimated by the number of cached operations using the xdr_buf pages. Yet another patch caches no pages for the solo sequence operation, or any compound where cache_this is False. So the hard limit calculation use of pages by a session is overestimated by the number of these operations in the cache. TODO: improve resource pre-allocation and negotiate session parameters accordingly. Respect and possibly adjust backchannel attributes. Signed-off-by: Marc Eshel <eshel@almaden.ibm.com> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> [nfsd41: remove headerpadsz from channel attributes] Our client and server only support a headerpadsz of 0. [nfsd41: use DRC limits in fore channel init] [nfsd41: do not change CREATE_SESSION back channel attrs] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [use sessionid_lock spin lock] [nfsd41: use bool inuse for slot state] Signed-off-by: Benny Halevy <bhalevy@panasas.com> [nfsd41 remove sl_session from alloc_init_session] Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> [simplify nfsd4_encode_create_session error handling] [nfsd41: fix comment style in init_forechannel_attrs] [nfsd41: allocate struct nfsd4_session and slot table in one piece] [nfsd41: no need to INIT_LIST_HEAD in alloc_init_session just prior to list_add] Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-04-03 07:28:28 +02:00
if (nfserr)
return nfserr;
RESERVE_SPACE(24);
WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
WRITE32(sess->seqid);
WRITE32(sess->flags);
ADJUST_ARGS();
RESERVE_SPACE(28);
WRITE32(0); /* headerpadsz */
WRITE32(sess->fore_channel.maxreq_sz);
WRITE32(sess->fore_channel.maxresp_sz);
WRITE32(sess->fore_channel.maxresp_cached);
WRITE32(sess->fore_channel.maxops);
WRITE32(sess->fore_channel.maxreqs);
WRITE32(sess->fore_channel.nr_rdma_attrs);
ADJUST_ARGS();
if (sess->fore_channel.nr_rdma_attrs) {
RESERVE_SPACE(4);
WRITE32(sess->fore_channel.rdma_attrs);
ADJUST_ARGS();
}
RESERVE_SPACE(28);
WRITE32(0); /* headerpadsz */
WRITE32(sess->back_channel.maxreq_sz);
WRITE32(sess->back_channel.maxresp_sz);
WRITE32(sess->back_channel.maxresp_cached);
WRITE32(sess->back_channel.maxops);
WRITE32(sess->back_channel.maxreqs);
WRITE32(sess->back_channel.nr_rdma_attrs);
ADJUST_ARGS();
if (sess->back_channel.nr_rdma_attrs) {
RESERVE_SPACE(4);
WRITE32(sess->back_channel.rdma_attrs);
ADJUST_ARGS();
}
return 0;
}
static __be32
nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
struct nfsd4_destroy_session *destroy_session)
{
return nfserr;
}
__be32
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
struct nfsd4_sequence *seq)
{
__be32 *p;
if (nfserr)
return nfserr;
RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
WRITE32(seq->seqid);
WRITE32(seq->slotid);
WRITE32(seq->maxslots);
/*
* FIXME: for now:
* target_maxslots = maxslots
* status_flags = 0
*/
WRITE32(seq->maxslots);
WRITE32(0);
ADJUST_ARGS();
return 0;
}
static __be32
nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
{
return nfserr;
}
typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
/*
* Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
* since we don't need to filter out obsolete ops as this is
* done in the decoding phase.
*/
static nfsd4_enc nfsd4_enc_ops[] = {
[OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
[OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
[OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
[OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
[OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
[OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
[OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
[OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
[OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
[OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
[OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
[OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
[OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
[OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
[OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
[OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
[OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
[OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
[OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
[OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
[OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
[OP_READ] = (nfsd4_enc)nfsd4_encode_read,
[OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
[OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
[OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
[OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
[OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
[OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
[OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
[OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
[OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
[OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
[OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
[OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
[OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
[OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
/* NFSv4.1 operations */
[OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
[OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
[OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
[OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
[OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
[OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
[OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
[OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
[OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
[OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
[OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
[OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
[OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
[OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
[OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
[OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
};
/*
* Calculate the total amount of memory that the compound response has taken
* after encoding the current operation.
*
* pad: add on 8 bytes for the next operation's op_code and status so that
* there is room to cache a failure on the next operation.
*
* Compare this length to the session se_fmaxresp_cached.
*
* Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
* will be at least a page and will therefore hold the xdr_buf head.
*/
static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
{
int status = 0;
struct xdr_buf *xb = &resp->rqstp->rq_res;
struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
struct nfsd4_session *session = NULL;
struct nfsd4_slot *slot = resp->cstate.slot;
u32 length, tlen = 0, pad = 8;
if (!nfsd4_has_session(&resp->cstate))
return status;
session = resp->cstate.session;
if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0)
return status;
if (resp->opcnt >= args->opcnt)
pad = 0; /* this is the last operation */
if (xb->page_len == 0) {
length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
} else {
if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
length = xb->head[0].iov_len + xb->page_len + tlen + pad;
}
dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
length, xb->page_len, tlen, pad);
if (length <= session->se_fchannel.maxresp_cached)
return status;
else
return nfserr_rep_too_big_to_cache;
}
void
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
__be32 *statp;
__be32 *p;
RESERVE_SPACE(8);
WRITE32(op->opnum);
statp = p++; /* to be backfilled at the end */
ADJUST_ARGS();
if (op->opnum == OP_ILLEGAL)
goto status;
BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
!nfsd4_enc_ops[op->opnum]);
op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
/* nfsd4_check_drc_limit guarantees enough room for error status */
if (!op->status && nfsd4_check_drc_limit(resp))
op->status = nfserr_rep_too_big_to_cache;
status:
/*
* 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)
{
__be32 *p;
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();
}
int
nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *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, __be32 *p, struct nfsd4_compoundargs *args)
{
__be32 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, __be32 *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);
if (nfsd4_has_session(&resp->cstate)) {
if (resp->cstate.status == nfserr_replay_cache &&
!nfsd4_not_cached(resp)) {
iov->iov_len = resp->cstate.iovlen;
} else {
nfsd4_store_cache_entry(resp);
dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
resp->cstate.slot->sl_inuse = 0;
}
if (resp->cstate.session)
nfsd4_put_session(resp->cstate.session);
}
return 1;
}
/*
* Local variables:
* c-basic-offset: 8
* End:
*/