4
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
10
#define NFSDDBG_FACILITY NFSDDBG_XDR
13
* Mapping of S_IF* types to NFS file types
15
static u32 nfs_ftypes[] = {
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NFNON, NFCHR, NFCHR, NFBAD,
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NFDIR, NFBAD, NFBLK, NFBAD,
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NFREG, NFBAD, NFLNK, NFBAD,
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NFSOCK, NFBAD, NFLNK, NFBAD,
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* XDR functions for basic NFS types
27
decode_fh(__be32 *p, struct svc_fh *fhp)
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fh_init(fhp, NFS_FHSIZE);
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memcpy(&fhp->fh_handle.fh_base, p, NFS_FHSIZE);
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fhp->fh_handle.fh_size = NFS_FHSIZE;
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/* FIXME: Look up export pointer here and verify
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* Sun Secure RPC if requested */
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return p + (NFS_FHSIZE >> 2);
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/* Helper function for NFSv2 ACL code */
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__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp)
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return decode_fh(p, fhp);
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encode_fh(__be32 *p, struct svc_fh *fhp)
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memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE);
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return p + (NFS_FHSIZE>> 2);
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* Decode a file name and make sure that the path contains
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* no slashes or null bytes.
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decode_filename(__be32 *p, char **namp, unsigned int *lenp)
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if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
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for (i = 0, name = *namp; i < *lenp; i++, name++) {
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if (*name == '\0' || *name == '/')
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decode_pathname(__be32 *p, char **namp, unsigned int *lenp)
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if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXPATHLEN)) != NULL) {
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for (i = 0, name = *namp; i < *lenp; i++, name++) {
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decode_sattr(__be32 *p, struct iattr *iap)
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/* Sun client bug compatibility check: some sun clients seem to
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* put 0xffff in the mode field when they mean 0xffffffff.
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* Quoting the 4.4BSD nfs server code: Nah nah nah nah na nah.
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if ((tmp = ntohl(*p++)) != (u32)-1 && tmp != 0xffff) {
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iap->ia_valid |= ATTR_MODE;
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if ((tmp = ntohl(*p++)) != (u32)-1) {
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iap->ia_valid |= ATTR_UID;
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if ((tmp = ntohl(*p++)) != (u32)-1) {
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iap->ia_valid |= ATTR_GID;
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if ((tmp = ntohl(*p++)) != (u32)-1) {
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iap->ia_valid |= ATTR_SIZE;
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tmp = ntohl(*p++); tmp1 = ntohl(*p++);
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if (tmp != (u32)-1 && tmp1 != (u32)-1) {
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iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
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iap->ia_atime.tv_sec = tmp;
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iap->ia_atime.tv_nsec = tmp1 * 1000;
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tmp = ntohl(*p++); tmp1 = ntohl(*p++);
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if (tmp != (u32)-1 && tmp1 != (u32)-1) {
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iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
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iap->ia_mtime.tv_sec = tmp;
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iap->ia_mtime.tv_nsec = tmp1 * 1000;
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* Passing the invalid value useconds=1000000 for mtime
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* is a Sun convention for "set both mtime and atime to
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* current server time". It's needed to make permissions
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* checks for the "touch" program across v2 mounts to
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* Solaris and Irix boxes work correctly. See description of
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* sattr in section 6.1 of "NFS Illustrated" by
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* Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
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iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET);
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encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
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struct dentry *dentry = fhp->fh_dentry;
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struct timespec time;
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type = (stat->mode & S_IFMT);
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*p++ = htonl(nfs_ftypes[type >> 12]);
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*p++ = htonl((u32) stat->mode);
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*p++ = htonl((u32) stat->nlink);
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*p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
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*p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
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if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
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*p++ = htonl(NFS_MAXPATHLEN);
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*p++ = htonl((u32) stat->size);
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*p++ = htonl((u32) stat->blksize);
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if (S_ISCHR(type) || S_ISBLK(type))
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*p++ = htonl(new_encode_dev(stat->rdev));
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*p++ = htonl(0xffffffff);
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*p++ = htonl((u32) stat->blocks);
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switch (fsid_source(fhp)) {
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*p++ = htonl(new_encode_dev(stat->dev));
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case FSIDSOURCE_FSID:
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*p++ = htonl((u32) fhp->fh_export->ex_fsid);
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case FSIDSOURCE_UUID:
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f = ((u32*)fhp->fh_export->ex_uuid)[0];
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f ^= ((u32*)fhp->fh_export->ex_uuid)[1];
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f ^= ((u32*)fhp->fh_export->ex_uuid)[2];
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f ^= ((u32*)fhp->fh_export->ex_uuid)[3];
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*p++ = htonl((u32) stat->ino);
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*p++ = htonl((u32) stat->atime.tv_sec);
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*p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
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lease_get_mtime(dentry->d_inode, &time);
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*p++ = htonl((u32) time.tv_sec);
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*p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0);
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*p++ = htonl((u32) stat->ctime.tv_sec);
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*p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
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/* Helper function for NFSv2 ACL code */
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__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
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vfs_getattr(fhp->fh_export->ex_path.mnt, fhp->fh_dentry, &stat);
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return encode_fattr(rqstp, p, fhp, &stat);
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* XDR decode functions
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nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
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return xdr_argsize_check(rqstp, p);
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nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
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if (!(p = decode_fh(p, &args->fh)))
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return xdr_argsize_check(rqstp, p);
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nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd_sattrargs *args)
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p = decode_fh(p, &args->fh);
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p = decode_sattr(p, &args->attrs);
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return xdr_argsize_check(rqstp, p);
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nfssvc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd_diropargs *args)
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if (!(p = decode_fh(p, &args->fh))
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|| !(p = decode_filename(p, &args->name, &args->len)))
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return xdr_argsize_check(rqstp, p);
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nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd_readargs *args)
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if (!(p = decode_fh(p, &args->fh)))
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args->offset = ntohl(*p++);
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len = args->count = ntohl(*p++);
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p++; /* totalcount - unused */
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if (len > NFSSVC_MAXBLKSIZE_V2)
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len = NFSSVC_MAXBLKSIZE_V2;
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/* set up somewhere to store response.
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* We take pages, put them on reslist and include in iovec
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pn = rqstp->rq_resused++;
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rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
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rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE;
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len -= rqstp->rq_vec[v].iov_len;
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return xdr_argsize_check(rqstp, p);
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nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd_writeargs *args)
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unsigned int len, hdr, dlen;
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if (!(p = decode_fh(p, &args->fh)))
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p++; /* beginoffset */
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args->offset = ntohl(*p++); /* offset */
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p++; /* totalcount */
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len = args->len = ntohl(*p++);
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* The protocol specifies a maximum of 8192 bytes.
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if (len > NFSSVC_MAXBLKSIZE_V2)
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* Check to make sure that we got the right number of
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hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
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dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
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* Round the length of the data which was specified up to
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* the next multiple of XDR units and then compare that
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* against the length which was actually received.
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* Note that when RPCSEC/GSS (for example) is used, the
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* data buffer can be padded so dlen might be larger
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* than required. It must never be smaller.
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if (dlen < XDR_QUADLEN(len)*4)
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rqstp->rq_vec[0].iov_base = (void*)p;
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rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
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while (len > rqstp->rq_vec[v].iov_len) {
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len -= rqstp->rq_vec[v].iov_len;
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rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
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rqstp->rq_vec[v].iov_len = PAGE_SIZE;
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rqstp->rq_vec[v].iov_len = len;
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nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd_createargs *args)
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if ( !(p = decode_fh(p, &args->fh))
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|| !(p = decode_filename(p, &args->name, &args->len)))
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p = decode_sattr(p, &args->attrs);
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return xdr_argsize_check(rqstp, p);
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nfssvc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd_renameargs *args)
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if (!(p = decode_fh(p, &args->ffh))
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|| !(p = decode_filename(p, &args->fname, &args->flen))
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|| !(p = decode_fh(p, &args->tfh))
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|| !(p = decode_filename(p, &args->tname, &args->tlen)))
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return xdr_argsize_check(rqstp, p);
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nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readlinkargs *args)
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if (!(p = decode_fh(p, &args->fh)))
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args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
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return xdr_argsize_check(rqstp, p);
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nfssvc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
365
struct nfsd_linkargs *args)
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if (!(p = decode_fh(p, &args->ffh))
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|| !(p = decode_fh(p, &args->tfh))
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|| !(p = decode_filename(p, &args->tname, &args->tlen)))
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return xdr_argsize_check(rqstp, p);
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nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
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struct nfsd_symlinkargs *args)
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if ( !(p = decode_fh(p, &args->ffh))
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|| !(p = decode_filename(p, &args->fname, &args->flen))
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|| !(p = decode_pathname(p, &args->tname, &args->tlen)))
383
p = decode_sattr(p, &args->attrs);
385
return xdr_argsize_check(rqstp, p);
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nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
390
struct nfsd_readdirargs *args)
392
if (!(p = decode_fh(p, &args->fh)))
394
args->cookie = ntohl(*p++);
395
args->count = ntohl(*p++);
396
if (args->count > PAGE_SIZE)
397
args->count = PAGE_SIZE;
399
args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
401
return xdr_argsize_check(rqstp, p);
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* XDR encode functions
408
nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
410
return xdr_ressize_check(rqstp, p);
414
nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
415
struct nfsd_attrstat *resp)
417
p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
418
return xdr_ressize_check(rqstp, p);
422
nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
423
struct nfsd_diropres *resp)
425
p = encode_fh(p, &resp->fh);
426
p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
427
return xdr_ressize_check(rqstp, p);
431
nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
432
struct nfsd_readlinkres *resp)
434
*p++ = htonl(resp->len);
435
xdr_ressize_check(rqstp, p);
436
rqstp->rq_res.page_len = resp->len;
438
/* need to pad the tail */
439
rqstp->rq_res.tail[0].iov_base = p;
441
rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
447
nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
448
struct nfsd_readres *resp)
450
p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
451
*p++ = htonl(resp->count);
452
xdr_ressize_check(rqstp, p);
454
/* now update rqstp->rq_res to reflect data as well */
455
rqstp->rq_res.page_len = resp->count;
456
if (resp->count & 3) {
457
/* need to pad the tail */
458
rqstp->rq_res.tail[0].iov_base = p;
460
rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
466
nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
467
struct nfsd_readdirres *resp)
469
xdr_ressize_check(rqstp, p);
471
*p++ = 0; /* no more entries */
472
*p++ = htonl((resp->common.err == nfserr_eof));
473
rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;
479
nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p,
480
struct nfsd_statfsres *resp)
482
struct kstatfs *stat = &resp->stats;
484
*p++ = htonl(NFSSVC_MAXBLKSIZE_V2); /* max transfer size */
485
*p++ = htonl(stat->f_bsize);
486
*p++ = htonl(stat->f_blocks);
487
*p++ = htonl(stat->f_bfree);
488
*p++ = htonl(stat->f_bavail);
489
return xdr_ressize_check(rqstp, p);
493
nfssvc_encode_entry(void *ccdv, const char *name,
494
int namlen, loff_t offset, u64 ino, unsigned int d_type)
496
struct readdir_cd *ccd = ccdv;
497
struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
498
__be32 *p = cd->buffer;
502
dprintk("nfsd: entry(%.*s off %ld ino %ld)\n",
503
namlen, name, offset, ino);
506
if (offset > ~((u32) 0)) {
507
cd->common.err = nfserr_fbig;
511
*cd->offset = htonl(offset);
512
if (namlen > NFS2_MAXNAMLEN)
513
namlen = NFS2_MAXNAMLEN;/* truncate filename */
515
slen = XDR_QUADLEN(namlen);
516
if ((buflen = cd->buflen - slen - 4) < 0) {
517
cd->common.err = nfserr_toosmall;
520
if (ino > ~((u32) 0)) {
521
cd->common.err = nfserr_fbig;
524
*p++ = xdr_one; /* mark entry present */
525
*p++ = htonl((u32) ino); /* file id */
526
p = xdr_encode_array(p, name, namlen);/* name length & name */
527
cd->offset = p; /* remember pointer */
528
*p++ = htonl(~0U); /* offset of next entry */
532
cd->common.err = nfs_ok;
537
* XDR release functions
540
nfssvc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
541
struct nfsd_fhandle *resp)