mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-14 15:54:15 +08:00
5d22c5ab85
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJXRL2PAAoJECebzXlCjuG+c34P/1wnkehVxDozBJp7UEzhrsE/ U1dpwfykzVEIMh68TldBvyrt2Lb4ThLPZ7V2dVwNqA831S/VM6fWJyw8WerSgGgU SUGOzdF04rNfy41lXQNpDiiC417Fbp4Js4O+Q5kd+8kqQbXYqCwz0ce3DVbAT571 JmJgBI8gZLhicyNRDOt0y6C+/3P+0bbXYvS8wkzY+CwbNczHJOCLhwViKzWTptm9 LCSgDGm68ckpR7mZkWfEF3WdiZ9+SxeI+pT9dcomzxNfbv8NluDplYmdLbepA2J8 uWHGprVe9WJMDnw4hJhrI2b3/rHIntpxuZYktmnb/z/ezBTyi3FXYWgAEdE1by+Y Gf7OewKOp8XcQ/iHRZ8vwXNrheHAr9++SB49mGBZJ3qj6bO+FrISQKX9FRxo6PrJ SDRgYjt5yUG2oD1AAs1NzuBPqZzR40mA6Yk4zuNAcxzK/S7DdRF/9Kjyk86TVv08 3E3O5i1RyVcU/A7JdnbiyeDFMQoRshdnN0HShIZcSfcfW+qFKghNlO9bFfSl904F jlG6moNB5OBiV8FNOelY+HGAYoUdw120QxqQMv47oZGKCjv+rfK38aB4GBJ4iEuo TrGqNmrMrs/AKdL3Sd+8LuJqSfXggrwUDc/KS6CFz/U0eBbp6k0kcd7FEyG/J8kW JxQ0URgyJ+DHfc60E8LN =k6RP -----END PGP SIGNATURE----- Merge tag 'nfsd-4.7' of git://linux-nfs.org/~bfields/linux Pull nfsd updates from Bruce Fields: "A very quiet cycle for nfsd, mainly just an RDMA update from Chuck Lever" * tag 'nfsd-4.7' of git://linux-nfs.org/~bfields/linux: sunrpc: fix stripping of padded MIC tokens svcrpc: autoload rdma module svcrdma: Generalize svc_rdma_xdr_decode_req() svcrdma: Eliminate code duplication in svc_rdma_recvfrom() svcrdma: Drain QP before freeing svcrdma_xprt svcrdma: Post Receives only for forward channel requests svcrdma: Remove superfluous line from rdma_read_chunks() svcrdma: svc_rdma_put_context() is invoked twice in Send error path svcrdma: Do not add XDR padding to xdr_buf page vector svcrdma: Support IPv6 with NFS/RDMA nfsd: handle seqid wraparound in nfsd4_preprocess_layout_stateid Remove unnecessary allocation
1117 lines
27 KiB
C
1117 lines
27 KiB
C
/*
|
|
* XDR support for nfsd/protocol version 3.
|
|
*
|
|
* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
|
|
*
|
|
* 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()!
|
|
*/
|
|
|
|
#include <linux/namei.h>
|
|
#include <linux/sunrpc/svc_xprt.h>
|
|
#include "xdr3.h"
|
|
#include "auth.h"
|
|
#include "netns.h"
|
|
#include "vfs.h"
|
|
|
|
#define NFSDDBG_FACILITY NFSDDBG_XDR
|
|
|
|
|
|
/*
|
|
* Mapping of S_IF* types to NFS file types
|
|
*/
|
|
static u32 nfs3_ftypes[] = {
|
|
NF3NON, NF3FIFO, NF3CHR, NF3BAD,
|
|
NF3DIR, NF3BAD, NF3BLK, NF3BAD,
|
|
NF3REG, NF3BAD, NF3LNK, NF3BAD,
|
|
NF3SOCK, NF3BAD, NF3LNK, NF3BAD,
|
|
};
|
|
|
|
/*
|
|
* XDR functions for basic NFS types
|
|
*/
|
|
static __be32 *
|
|
encode_time3(__be32 *p, struct timespec *time)
|
|
{
|
|
*p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec);
|
|
return p;
|
|
}
|
|
|
|
static __be32 *
|
|
decode_time3(__be32 *p, struct timespec *time)
|
|
{
|
|
time->tv_sec = ntohl(*p++);
|
|
time->tv_nsec = ntohl(*p++);
|
|
return p;
|
|
}
|
|
|
|
static __be32 *
|
|
decode_fh(__be32 *p, struct svc_fh *fhp)
|
|
{
|
|
unsigned int size;
|
|
fh_init(fhp, NFS3_FHSIZE);
|
|
size = ntohl(*p++);
|
|
if (size > NFS3_FHSIZE)
|
|
return NULL;
|
|
|
|
memcpy(&fhp->fh_handle.fh_base, p, size);
|
|
fhp->fh_handle.fh_size = size;
|
|
return p + XDR_QUADLEN(size);
|
|
}
|
|
|
|
/* Helper function for NFSv3 ACL code */
|
|
__be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp)
|
|
{
|
|
return decode_fh(p, fhp);
|
|
}
|
|
|
|
static __be32 *
|
|
encode_fh(__be32 *p, struct svc_fh *fhp)
|
|
{
|
|
unsigned int size = fhp->fh_handle.fh_size;
|
|
*p++ = htonl(size);
|
|
if (size) p[XDR_QUADLEN(size)-1]=0;
|
|
memcpy(p, &fhp->fh_handle.fh_base, size);
|
|
return p + XDR_QUADLEN(size);
|
|
}
|
|
|
|
/*
|
|
* Decode a file name and make sure that the path contains
|
|
* no slashes or null bytes.
|
|
*/
|
|
static __be32 *
|
|
decode_filename(__be32 *p, char **namp, unsigned int *lenp)
|
|
{
|
|
char *name;
|
|
unsigned int i;
|
|
|
|
if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) {
|
|
for (i = 0, name = *namp; i < *lenp; i++, name++) {
|
|
if (*name == '\0' || *name == '/')
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
static __be32 *
|
|
decode_sattr3(__be32 *p, struct iattr *iap)
|
|
{
|
|
u32 tmp;
|
|
|
|
iap->ia_valid = 0;
|
|
|
|
if (*p++) {
|
|
iap->ia_valid |= ATTR_MODE;
|
|
iap->ia_mode = ntohl(*p++);
|
|
}
|
|
if (*p++) {
|
|
iap->ia_uid = make_kuid(&init_user_ns, ntohl(*p++));
|
|
if (uid_valid(iap->ia_uid))
|
|
iap->ia_valid |= ATTR_UID;
|
|
}
|
|
if (*p++) {
|
|
iap->ia_gid = make_kgid(&init_user_ns, ntohl(*p++));
|
|
if (gid_valid(iap->ia_gid))
|
|
iap->ia_valid |= ATTR_GID;
|
|
}
|
|
if (*p++) {
|
|
u64 newsize;
|
|
|
|
iap->ia_valid |= ATTR_SIZE;
|
|
p = xdr_decode_hyper(p, &newsize);
|
|
iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX);
|
|
}
|
|
if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
|
|
iap->ia_valid |= ATTR_ATIME;
|
|
} else if (tmp == 2) { /* set to client time */
|
|
iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
|
|
iap->ia_atime.tv_sec = ntohl(*p++);
|
|
iap->ia_atime.tv_nsec = ntohl(*p++);
|
|
}
|
|
if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
|
|
iap->ia_valid |= ATTR_MTIME;
|
|
} else if (tmp == 2) { /* set to client time */
|
|
iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
|
|
iap->ia_mtime.tv_sec = ntohl(*p++);
|
|
iap->ia_mtime.tv_nsec = ntohl(*p++);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp)
|
|
{
|
|
u64 f;
|
|
switch(fsid_source(fhp)) {
|
|
default:
|
|
case FSIDSOURCE_DEV:
|
|
p = xdr_encode_hyper(p, (u64)huge_encode_dev
|
|
(fhp->fh_dentry->d_sb->s_dev));
|
|
break;
|
|
case FSIDSOURCE_FSID:
|
|
p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
|
|
break;
|
|
case FSIDSOURCE_UUID:
|
|
f = ((u64*)fhp->fh_export->ex_uuid)[0];
|
|
f ^= ((u64*)fhp->fh_export->ex_uuid)[1];
|
|
p = xdr_encode_hyper(p, f);
|
|
break;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static __be32 *
|
|
encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
|
|
struct kstat *stat)
|
|
{
|
|
*p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
|
|
*p++ = htonl((u32) (stat->mode & S_IALLUGO));
|
|
*p++ = htonl((u32) stat->nlink);
|
|
*p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid));
|
|
*p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid));
|
|
if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
|
|
p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
|
|
} else {
|
|
p = xdr_encode_hyper(p, (u64) stat->size);
|
|
}
|
|
p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
|
|
*p++ = htonl((u32) MAJOR(stat->rdev));
|
|
*p++ = htonl((u32) MINOR(stat->rdev));
|
|
p = encode_fsid(p, fhp);
|
|
p = xdr_encode_hyper(p, stat->ino);
|
|
p = encode_time3(p, &stat->atime);
|
|
p = encode_time3(p, &stat->mtime);
|
|
p = encode_time3(p, &stat->ctime);
|
|
|
|
return p;
|
|
}
|
|
|
|
static __be32 *
|
|
encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
|
|
{
|
|
/* Attributes to follow */
|
|
*p++ = xdr_one;
|
|
return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr);
|
|
}
|
|
|
|
/*
|
|
* Encode post-operation attributes.
|
|
* The inode may be NULL if the call failed because of a stale file
|
|
* handle. In this case, no attributes are returned.
|
|
*/
|
|
static __be32 *
|
|
encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
|
|
{
|
|
struct dentry *dentry = fhp->fh_dentry;
|
|
if (dentry && d_really_is_positive(dentry)) {
|
|
__be32 err;
|
|
struct kstat stat;
|
|
|
|
err = fh_getattr(fhp, &stat);
|
|
if (!err) {
|
|
*p++ = xdr_one; /* attributes follow */
|
|
lease_get_mtime(d_inode(dentry), &stat.mtime);
|
|
return encode_fattr3(rqstp, p, fhp, &stat);
|
|
}
|
|
}
|
|
*p++ = xdr_zero;
|
|
return p;
|
|
}
|
|
|
|
/* Helper for NFSv3 ACLs */
|
|
__be32 *
|
|
nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
|
|
{
|
|
return encode_post_op_attr(rqstp, p, fhp);
|
|
}
|
|
|
|
/*
|
|
* Enocde weak cache consistency data
|
|
*/
|
|
static __be32 *
|
|
encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
|
|
{
|
|
struct dentry *dentry = fhp->fh_dentry;
|
|
|
|
if (dentry && d_really_is_positive(dentry) && fhp->fh_post_saved) {
|
|
if (fhp->fh_pre_saved) {
|
|
*p++ = xdr_one;
|
|
p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size);
|
|
p = encode_time3(p, &fhp->fh_pre_mtime);
|
|
p = encode_time3(p, &fhp->fh_pre_ctime);
|
|
} else {
|
|
*p++ = xdr_zero;
|
|
}
|
|
return encode_saved_post_attr(rqstp, p, fhp);
|
|
}
|
|
/* no pre- or post-attrs */
|
|
*p++ = xdr_zero;
|
|
return encode_post_op_attr(rqstp, p, fhp);
|
|
}
|
|
|
|
/*
|
|
* Fill in the post_op attr for the wcc data
|
|
*/
|
|
void fill_post_wcc(struct svc_fh *fhp)
|
|
{
|
|
__be32 err;
|
|
|
|
if (fhp->fh_post_saved)
|
|
printk("nfsd: inode locked twice during operation.\n");
|
|
|
|
err = fh_getattr(fhp, &fhp->fh_post_attr);
|
|
fhp->fh_post_change = d_inode(fhp->fh_dentry)->i_version;
|
|
if (err) {
|
|
fhp->fh_post_saved = false;
|
|
/* Grab the ctime anyway - set_change_info might use it */
|
|
fhp->fh_post_attr.ctime = d_inode(fhp->fh_dentry)->i_ctime;
|
|
} else
|
|
fhp->fh_post_saved = true;
|
|
}
|
|
|
|
/*
|
|
* XDR decode functions
|
|
*/
|
|
int
|
|
nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
|
|
{
|
|
p = decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_sattrargs *args)
|
|
{
|
|
p = decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
p = decode_sattr3(p, &args->attrs);
|
|
|
|
if ((args->check_guard = ntohl(*p++)) != 0) {
|
|
struct timespec time;
|
|
p = decode_time3(p, &time);
|
|
args->guardtime = time.tv_sec;
|
|
}
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_diropargs *args)
|
|
{
|
|
if (!(p = decode_fh(p, &args->fh))
|
|
|| !(p = decode_filename(p, &args->name, &args->len)))
|
|
return 0;
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_accessargs *args)
|
|
{
|
|
p = decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
args->access = ntohl(*p++);
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_readargs *args)
|
|
{
|
|
unsigned int len;
|
|
int v;
|
|
u32 max_blocksize = svc_max_payload(rqstp);
|
|
|
|
p = decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
p = xdr_decode_hyper(p, &args->offset);
|
|
|
|
args->count = ntohl(*p++);
|
|
len = min(args->count, max_blocksize);
|
|
|
|
/* set up the kvec */
|
|
v=0;
|
|
while (len > 0) {
|
|
struct page *p = *(rqstp->rq_next_page++);
|
|
|
|
rqstp->rq_vec[v].iov_base = page_address(p);
|
|
rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
|
|
len -= rqstp->rq_vec[v].iov_len;
|
|
v++;
|
|
}
|
|
args->vlen = v;
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_writeargs *args)
|
|
{
|
|
unsigned int len, v, hdr, dlen;
|
|
u32 max_blocksize = svc_max_payload(rqstp);
|
|
|
|
p = decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
p = xdr_decode_hyper(p, &args->offset);
|
|
|
|
args->count = ntohl(*p++);
|
|
args->stable = ntohl(*p++);
|
|
len = args->len = ntohl(*p++);
|
|
/*
|
|
* The count must equal the amount of data passed.
|
|
*/
|
|
if (args->count != args->len)
|
|
return 0;
|
|
|
|
/*
|
|
* Check to make sure that we got the right number of
|
|
* bytes.
|
|
*/
|
|
hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
|
|
dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
|
|
+ rqstp->rq_arg.tail[0].iov_len - hdr;
|
|
/*
|
|
* Round the length of the data which was specified up to
|
|
* the next multiple of XDR units and then compare that
|
|
* against the length which was actually received.
|
|
* Note that when RPCSEC/GSS (for example) is used, the
|
|
* data buffer can be padded so dlen might be larger
|
|
* than required. It must never be smaller.
|
|
*/
|
|
if (dlen < XDR_QUADLEN(len)*4)
|
|
return 0;
|
|
|
|
if (args->count > max_blocksize) {
|
|
args->count = max_blocksize;
|
|
len = args->len = max_blocksize;
|
|
}
|
|
rqstp->rq_vec[0].iov_base = (void*)p;
|
|
rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
|
|
v = 0;
|
|
while (len > rqstp->rq_vec[v].iov_len) {
|
|
len -= rqstp->rq_vec[v].iov_len;
|
|
v++;
|
|
rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
|
|
rqstp->rq_vec[v].iov_len = PAGE_SIZE;
|
|
}
|
|
rqstp->rq_vec[v].iov_len = len;
|
|
args->vlen = v + 1;
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_createargs *args)
|
|
{
|
|
if (!(p = decode_fh(p, &args->fh))
|
|
|| !(p = decode_filename(p, &args->name, &args->len)))
|
|
return 0;
|
|
|
|
switch (args->createmode = ntohl(*p++)) {
|
|
case NFS3_CREATE_UNCHECKED:
|
|
case NFS3_CREATE_GUARDED:
|
|
p = decode_sattr3(p, &args->attrs);
|
|
break;
|
|
case NFS3_CREATE_EXCLUSIVE:
|
|
args->verf = p;
|
|
p += 2;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
int
|
|
nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_createargs *args)
|
|
{
|
|
if (!(p = decode_fh(p, &args->fh)) ||
|
|
!(p = decode_filename(p, &args->name, &args->len)))
|
|
return 0;
|
|
p = decode_sattr3(p, &args->attrs);
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_symlinkargs *args)
|
|
{
|
|
unsigned int len, avail;
|
|
char *old, *new;
|
|
struct kvec *vec;
|
|
|
|
if (!(p = decode_fh(p, &args->ffh)) ||
|
|
!(p = decode_filename(p, &args->fname, &args->flen))
|
|
)
|
|
return 0;
|
|
p = decode_sattr3(p, &args->attrs);
|
|
|
|
/* now decode the pathname, which might be larger than the first page.
|
|
* As we have to check for nul's anyway, we copy it into a new page
|
|
* This page appears in the rq_res.pages list, but as pages_len is always
|
|
* 0, it won't get in the way
|
|
*/
|
|
len = ntohl(*p++);
|
|
if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE)
|
|
return 0;
|
|
args->tname = new = page_address(*(rqstp->rq_next_page++));
|
|
args->tlen = len;
|
|
/* first copy and check from the first page */
|
|
old = (char*)p;
|
|
vec = &rqstp->rq_arg.head[0];
|
|
avail = vec->iov_len - (old - (char*)vec->iov_base);
|
|
while (len && avail && *old) {
|
|
*new++ = *old++;
|
|
len--;
|
|
avail--;
|
|
}
|
|
/* now copy next page if there is one */
|
|
if (len && !avail && rqstp->rq_arg.page_len) {
|
|
avail = min_t(unsigned int, rqstp->rq_arg.page_len, PAGE_SIZE);
|
|
old = page_address(rqstp->rq_arg.pages[0]);
|
|
}
|
|
while (len && avail && *old) {
|
|
*new++ = *old++;
|
|
len--;
|
|
avail--;
|
|
}
|
|
*new = '\0';
|
|
if (len)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_mknodargs *args)
|
|
{
|
|
if (!(p = decode_fh(p, &args->fh))
|
|
|| !(p = decode_filename(p, &args->name, &args->len)))
|
|
return 0;
|
|
|
|
args->ftype = ntohl(*p++);
|
|
|
|
if (args->ftype == NF3BLK || args->ftype == NF3CHR
|
|
|| args->ftype == NF3SOCK || args->ftype == NF3FIFO)
|
|
p = decode_sattr3(p, &args->attrs);
|
|
|
|
if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
|
|
args->major = ntohl(*p++);
|
|
args->minor = ntohl(*p++);
|
|
}
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_renameargs *args)
|
|
{
|
|
if (!(p = decode_fh(p, &args->ffh))
|
|
|| !(p = decode_filename(p, &args->fname, &args->flen))
|
|
|| !(p = decode_fh(p, &args->tfh))
|
|
|| !(p = decode_filename(p, &args->tname, &args->tlen)))
|
|
return 0;
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_readlinkargs *args)
|
|
{
|
|
p = decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
args->buffer = page_address(*(rqstp->rq_next_page++));
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_linkargs *args)
|
|
{
|
|
if (!(p = decode_fh(p, &args->ffh))
|
|
|| !(p = decode_fh(p, &args->tfh))
|
|
|| !(p = decode_filename(p, &args->tname, &args->tlen)))
|
|
return 0;
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_readdirargs *args)
|
|
{
|
|
p = decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
p = xdr_decode_hyper(p, &args->cookie);
|
|
args->verf = p; p += 2;
|
|
args->dircount = ~0;
|
|
args->count = ntohl(*p++);
|
|
args->count = min_t(u32, args->count, PAGE_SIZE);
|
|
args->buffer = page_address(*(rqstp->rq_next_page++));
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_readdirargs *args)
|
|
{
|
|
int len;
|
|
u32 max_blocksize = svc_max_payload(rqstp);
|
|
|
|
p = decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
p = xdr_decode_hyper(p, &args->cookie);
|
|
args->verf = p; p += 2;
|
|
args->dircount = ntohl(*p++);
|
|
args->count = ntohl(*p++);
|
|
|
|
len = args->count = min(args->count, max_blocksize);
|
|
while (len > 0) {
|
|
struct page *p = *(rqstp->rq_next_page++);
|
|
if (!args->buffer)
|
|
args->buffer = page_address(p);
|
|
len -= PAGE_SIZE;
|
|
}
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
int
|
|
nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_commitargs *args)
|
|
{
|
|
p = decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
p = xdr_decode_hyper(p, &args->offset);
|
|
args->count = ntohl(*p++);
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
/*
|
|
* XDR encode functions
|
|
*/
|
|
/*
|
|
* There must be an encoding function for void results so svc_process
|
|
* will work properly.
|
|
*/
|
|
int
|
|
nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
|
|
{
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* GETATTR */
|
|
int
|
|
nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_attrstat *resp)
|
|
{
|
|
if (resp->status == 0) {
|
|
lease_get_mtime(d_inode(resp->fh.fh_dentry),
|
|
&resp->stat.mtime);
|
|
p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat);
|
|
}
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* SETATTR, REMOVE, RMDIR */
|
|
int
|
|
nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_attrstat *resp)
|
|
{
|
|
p = encode_wcc_data(rqstp, p, &resp->fh);
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* LOOKUP */
|
|
int
|
|
nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_diropres *resp)
|
|
{
|
|
if (resp->status == 0) {
|
|
p = encode_fh(p, &resp->fh);
|
|
p = encode_post_op_attr(rqstp, p, &resp->fh);
|
|
}
|
|
p = encode_post_op_attr(rqstp, p, &resp->dirfh);
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* ACCESS */
|
|
int
|
|
nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_accessres *resp)
|
|
{
|
|
p = encode_post_op_attr(rqstp, p, &resp->fh);
|
|
if (resp->status == 0)
|
|
*p++ = htonl(resp->access);
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* READLINK */
|
|
int
|
|
nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_readlinkres *resp)
|
|
{
|
|
p = encode_post_op_attr(rqstp, p, &resp->fh);
|
|
if (resp->status == 0) {
|
|
*p++ = htonl(resp->len);
|
|
xdr_ressize_check(rqstp, p);
|
|
rqstp->rq_res.page_len = resp->len;
|
|
if (resp->len & 3) {
|
|
/* need to pad the tail */
|
|
rqstp->rq_res.tail[0].iov_base = p;
|
|
*p = 0;
|
|
rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
|
|
}
|
|
return 1;
|
|
} else
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* READ */
|
|
int
|
|
nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_readres *resp)
|
|
{
|
|
p = encode_post_op_attr(rqstp, p, &resp->fh);
|
|
if (resp->status == 0) {
|
|
*p++ = htonl(resp->count);
|
|
*p++ = htonl(resp->eof);
|
|
*p++ = htonl(resp->count); /* xdr opaque count */
|
|
xdr_ressize_check(rqstp, p);
|
|
/* now update rqstp->rq_res to reflect data as well */
|
|
rqstp->rq_res.page_len = resp->count;
|
|
if (resp->count & 3) {
|
|
/* need to pad the tail */
|
|
rqstp->rq_res.tail[0].iov_base = p;
|
|
*p = 0;
|
|
rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3);
|
|
}
|
|
return 1;
|
|
} else
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* WRITE */
|
|
int
|
|
nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_writeres *resp)
|
|
{
|
|
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
|
|
|
|
p = encode_wcc_data(rqstp, p, &resp->fh);
|
|
if (resp->status == 0) {
|
|
*p++ = htonl(resp->count);
|
|
*p++ = htonl(resp->committed);
|
|
*p++ = htonl(nn->nfssvc_boot.tv_sec);
|
|
*p++ = htonl(nn->nfssvc_boot.tv_usec);
|
|
}
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* CREATE, MKDIR, SYMLINK, MKNOD */
|
|
int
|
|
nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_diropres *resp)
|
|
{
|
|
if (resp->status == 0) {
|
|
*p++ = xdr_one;
|
|
p = encode_fh(p, &resp->fh);
|
|
p = encode_post_op_attr(rqstp, p, &resp->fh);
|
|
}
|
|
p = encode_wcc_data(rqstp, p, &resp->dirfh);
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* RENAME */
|
|
int
|
|
nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_renameres *resp)
|
|
{
|
|
p = encode_wcc_data(rqstp, p, &resp->ffh);
|
|
p = encode_wcc_data(rqstp, p, &resp->tfh);
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* LINK */
|
|
int
|
|
nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_linkres *resp)
|
|
{
|
|
p = encode_post_op_attr(rqstp, p, &resp->fh);
|
|
p = encode_wcc_data(rqstp, p, &resp->tfh);
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* READDIR */
|
|
int
|
|
nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_readdirres *resp)
|
|
{
|
|
p = encode_post_op_attr(rqstp, p, &resp->fh);
|
|
|
|
if (resp->status == 0) {
|
|
/* stupid readdir cookie */
|
|
memcpy(p, resp->verf, 8); p += 2;
|
|
xdr_ressize_check(rqstp, p);
|
|
if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE)
|
|
return 1; /*No room for trailer */
|
|
rqstp->rq_res.page_len = (resp->count) << 2;
|
|
|
|
/* add the 'tail' to the end of the 'head' page - page 0. */
|
|
rqstp->rq_res.tail[0].iov_base = p;
|
|
*p++ = 0; /* no more entries */
|
|
*p++ = htonl(resp->common.err == nfserr_eof);
|
|
rqstp->rq_res.tail[0].iov_len = 2<<2;
|
|
return 1;
|
|
} else
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
static __be32 *
|
|
encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
|
|
int namlen, u64 ino)
|
|
{
|
|
*p++ = xdr_one; /* mark entry present */
|
|
p = xdr_encode_hyper(p, ino); /* file id */
|
|
p = xdr_encode_array(p, name, namlen);/* name length & name */
|
|
|
|
cd->offset = p; /* remember pointer */
|
|
p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */
|
|
|
|
return p;
|
|
}
|
|
|
|
static __be32
|
|
compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
|
|
const char *name, int namlen, u64 ino)
|
|
{
|
|
struct svc_export *exp;
|
|
struct dentry *dparent, *dchild;
|
|
__be32 rv = nfserr_noent;
|
|
|
|
dparent = cd->fh.fh_dentry;
|
|
exp = cd->fh.fh_export;
|
|
|
|
if (isdotent(name, namlen)) {
|
|
if (namlen == 2) {
|
|
dchild = dget_parent(dparent);
|
|
/* filesystem root - cannot return filehandle for ".." */
|
|
if (dchild == dparent)
|
|
goto out;
|
|
} else
|
|
dchild = dget(dparent);
|
|
} else
|
|
dchild = lookup_one_len_unlocked(name, dparent, namlen);
|
|
if (IS_ERR(dchild))
|
|
return rv;
|
|
if (d_mountpoint(dchild))
|
|
goto out;
|
|
if (d_really_is_negative(dchild))
|
|
goto out;
|
|
if (dchild->d_inode->i_ino != ino)
|
|
goto out;
|
|
rv = fh_compose(fhp, exp, dchild, &cd->fh);
|
|
out:
|
|
dput(dchild);
|
|
return rv;
|
|
}
|
|
|
|
static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino)
|
|
{
|
|
struct svc_fh *fh = &cd->scratch;
|
|
__be32 err;
|
|
|
|
fh_init(fh, NFS3_FHSIZE);
|
|
err = compose_entry_fh(cd, fh, name, namlen, ino);
|
|
if (err) {
|
|
*p++ = 0;
|
|
*p++ = 0;
|
|
goto out;
|
|
}
|
|
p = encode_post_op_attr(cd->rqstp, p, fh);
|
|
*p++ = xdr_one; /* yes, a file handle follows */
|
|
p = encode_fh(p, fh);
|
|
out:
|
|
fh_put(fh);
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* Encode a directory entry. This one works for both normal readdir
|
|
* and readdirplus.
|
|
* The normal readdir reply requires 2 (fileid) + 1 (stringlen)
|
|
* + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
|
|
*
|
|
* The readdirplus baggage is 1+21 words for post_op_attr, plus the
|
|
* file handle.
|
|
*/
|
|
|
|
#define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
|
|
#define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
|
|
static int
|
|
encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
|
|
loff_t offset, u64 ino, unsigned int d_type, int plus)
|
|
{
|
|
struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
|
|
common);
|
|
__be32 *p = cd->buffer;
|
|
caddr_t curr_page_addr = NULL;
|
|
struct page ** page;
|
|
int slen; /* string (name) length */
|
|
int elen; /* estimated entry length in words */
|
|
int num_entry_words = 0; /* actual number of words */
|
|
|
|
if (cd->offset) {
|
|
u64 offset64 = offset;
|
|
|
|
if (unlikely(cd->offset1)) {
|
|
/* we ended up with offset on a page boundary */
|
|
*cd->offset = htonl(offset64 >> 32);
|
|
*cd->offset1 = htonl(offset64 & 0xffffffff);
|
|
cd->offset1 = NULL;
|
|
} else {
|
|
xdr_encode_hyper(cd->offset, offset64);
|
|
}
|
|
}
|
|
|
|
/*
|
|
dprintk("encode_entry(%.*s @%ld%s)\n",
|
|
namlen, name, (long) offset, plus? " plus" : "");
|
|
*/
|
|
|
|
/* truncate filename if too long */
|
|
namlen = min(namlen, NFS3_MAXNAMLEN);
|
|
|
|
slen = XDR_QUADLEN(namlen);
|
|
elen = slen + NFS3_ENTRY_BAGGAGE
|
|
+ (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
|
|
|
|
if (cd->buflen < elen) {
|
|
cd->common.err = nfserr_toosmall;
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* determine which page in rq_respages[] we are currently filling */
|
|
for (page = cd->rqstp->rq_respages + 1;
|
|
page < cd->rqstp->rq_next_page; page++) {
|
|
curr_page_addr = page_address(*page);
|
|
|
|
if (((caddr_t)cd->buffer >= curr_page_addr) &&
|
|
((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
|
|
break;
|
|
}
|
|
|
|
if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
|
|
/* encode entry in current page */
|
|
|
|
p = encode_entry_baggage(cd, p, name, namlen, ino);
|
|
|
|
if (plus)
|
|
p = encode_entryplus_baggage(cd, p, name, namlen, ino);
|
|
num_entry_words = p - cd->buffer;
|
|
} else if (*(page+1) != NULL) {
|
|
/* temporarily encode entry into next page, then move back to
|
|
* current and next page in rq_respages[] */
|
|
__be32 *p1, *tmp;
|
|
int len1, len2;
|
|
|
|
/* grab next page for temporary storage of entry */
|
|
p1 = tmp = page_address(*(page+1));
|
|
|
|
p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
|
|
|
|
if (plus)
|
|
p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino);
|
|
|
|
/* determine entry word length and lengths to go in pages */
|
|
num_entry_words = p1 - tmp;
|
|
len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
|
|
if ((num_entry_words << 2) < len1) {
|
|
/* the actual number of words in the entry is less
|
|
* than elen and can still fit in the current page
|
|
*/
|
|
memmove(p, tmp, num_entry_words << 2);
|
|
p += num_entry_words;
|
|
|
|
/* update offset */
|
|
cd->offset = cd->buffer + (cd->offset - tmp);
|
|
} else {
|
|
unsigned int offset_r = (cd->offset - tmp) << 2;
|
|
|
|
/* update pointer to offset location.
|
|
* This is a 64bit quantity, so we need to
|
|
* deal with 3 cases:
|
|
* - entirely in first page
|
|
* - entirely in second page
|
|
* - 4 bytes in each page
|
|
*/
|
|
if (offset_r + 8 <= len1) {
|
|
cd->offset = p + (cd->offset - tmp);
|
|
} else if (offset_r >= len1) {
|
|
cd->offset -= len1 >> 2;
|
|
} else {
|
|
/* sitting on the fence */
|
|
BUG_ON(offset_r != len1 - 4);
|
|
cd->offset = p + (cd->offset - tmp);
|
|
cd->offset1 = tmp;
|
|
}
|
|
|
|
len2 = (num_entry_words << 2) - len1;
|
|
|
|
/* move from temp page to current and next pages */
|
|
memmove(p, tmp, len1);
|
|
memmove(tmp, (caddr_t)tmp+len1, len2);
|
|
|
|
p = tmp + (len2 >> 2);
|
|
}
|
|
}
|
|
else {
|
|
cd->common.err = nfserr_toosmall;
|
|
return -EINVAL;
|
|
}
|
|
|
|
cd->buflen -= num_entry_words;
|
|
cd->buffer = p;
|
|
cd->common.err = nfs_ok;
|
|
return 0;
|
|
|
|
}
|
|
|
|
int
|
|
nfs3svc_encode_entry(void *cd, const char *name,
|
|
int namlen, loff_t offset, u64 ino, unsigned int d_type)
|
|
{
|
|
return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
|
|
}
|
|
|
|
int
|
|
nfs3svc_encode_entry_plus(void *cd, const char *name,
|
|
int namlen, loff_t offset, u64 ino,
|
|
unsigned int d_type)
|
|
{
|
|
return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
|
|
}
|
|
|
|
/* FSSTAT */
|
|
int
|
|
nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_fsstatres *resp)
|
|
{
|
|
struct kstatfs *s = &resp->stats;
|
|
u64 bs = s->f_bsize;
|
|
|
|
*p++ = xdr_zero; /* no post_op_attr */
|
|
|
|
if (resp->status == 0) {
|
|
p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
|
|
p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
|
|
p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
|
|
p = xdr_encode_hyper(p, s->f_files); /* total inodes */
|
|
p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
|
|
p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
|
|
*p++ = htonl(resp->invarsec); /* mean unchanged time */
|
|
}
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* FSINFO */
|
|
int
|
|
nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_fsinfores *resp)
|
|
{
|
|
*p++ = xdr_zero; /* no post_op_attr */
|
|
|
|
if (resp->status == 0) {
|
|
*p++ = htonl(resp->f_rtmax);
|
|
*p++ = htonl(resp->f_rtpref);
|
|
*p++ = htonl(resp->f_rtmult);
|
|
*p++ = htonl(resp->f_wtmax);
|
|
*p++ = htonl(resp->f_wtpref);
|
|
*p++ = htonl(resp->f_wtmult);
|
|
*p++ = htonl(resp->f_dtpref);
|
|
p = xdr_encode_hyper(p, resp->f_maxfilesize);
|
|
*p++ = xdr_one;
|
|
*p++ = xdr_zero;
|
|
*p++ = htonl(resp->f_properties);
|
|
}
|
|
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* PATHCONF */
|
|
int
|
|
nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_pathconfres *resp)
|
|
{
|
|
*p++ = xdr_zero; /* no post_op_attr */
|
|
|
|
if (resp->status == 0) {
|
|
*p++ = htonl(resp->p_link_max);
|
|
*p++ = htonl(resp->p_name_max);
|
|
*p++ = htonl(resp->p_no_trunc);
|
|
*p++ = htonl(resp->p_chown_restricted);
|
|
*p++ = htonl(resp->p_case_insensitive);
|
|
*p++ = htonl(resp->p_case_preserving);
|
|
}
|
|
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/* COMMIT */
|
|
int
|
|
nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_commitres *resp)
|
|
{
|
|
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
|
|
|
|
p = encode_wcc_data(rqstp, p, &resp->fh);
|
|
/* Write verifier */
|
|
if (resp->status == 0) {
|
|
*p++ = htonl(nn->nfssvc_boot.tv_sec);
|
|
*p++ = htonl(nn->nfssvc_boot.tv_usec);
|
|
}
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/*
|
|
* XDR release functions
|
|
*/
|
|
int
|
|
nfs3svc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_attrstat *resp)
|
|
{
|
|
fh_put(&resp->fh);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
nfs3svc_release_fhandle2(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_fhandle_pair *resp)
|
|
{
|
|
fh_put(&resp->fh1);
|
|
fh_put(&resp->fh2);
|
|
return 1;
|
|
}
|