Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1092 insertions, 0 deletions

diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
new file mode 100644
index 000000000000..11f806835c5a
--- /dev/null
+++ b/fs/nfsd/nfs3xdr.c
@@ -0,0 +1,1092 @@
+/*
+ * linux/fs/nfsd/nfs3xdr.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/types.h>
+#include <linux/time.h>
+#include <linux/nfs3.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/dcache.h>
+#include <linux/namei.h>
+#include <linux/mm.h>
+#include <linux/vfs.h>
+#include <linux/sunrpc/xdr.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/xdr3.h>
+
+#define NFSDDBG_FACILITY                NFSDDBG_XDR
+
+#ifdef NFSD_OPTIMIZE_SPACE
+# define inline
+#endif
+
+
+/*
+ * 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 inline u32 *
+encode_time3(u32 *p, struct timespec *time)
+{
+        *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec);
+        return p;
+}
+
+static inline u32 *
+decode_time3(u32 *p, struct timespec *time)
+{
+        time->tv_sec = ntohl(*p++);
+        time->tv_nsec = ntohl(*p++);
+        return p;
+}
+
+static inline u32 *
+decode_fh(u32 *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);
+}
+
+static inline u32 *
+encode_fh(u32 *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 inline u32 *
+decode_filename(u32 *p, char **namp, int *lenp)
+{
+        char            *name;
+        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 inline u32 *
+decode_sattr3(u32 *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_valid |= ATTR_UID;
+                iap->ia_uid = ntohl(*p++);
+        }
+        if (*p++) {
+                iap->ia_valid |= ATTR_GID;
+                iap->ia_gid = ntohl(*p++);
+        }
+        if (*p++) {
+                u64     newsize;
+
+                iap->ia_valid |= ATTR_SIZE;
+                p = xdr_decode_hyper(p, &newsize);
+                if (newsize <= NFS_OFFSET_MAX)
+                        iap->ia_size = newsize;
+                else
+                        iap->ia_size = 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 inline u32 *
+encode_fattr3(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
+{
+        struct vfsmount *mnt = fhp->fh_export->ex_mnt;
+        struct dentry   *dentry = fhp->fh_dentry;
+        struct kstat stat;
+        struct timespec time;
+
+        vfs_getattr(mnt, dentry, &stat);
+
+        *p++ = htonl(nfs3_ftypes[(stat.mode & S_IFMT) >> 12]);
+        *p++ = htonl((u32) stat.mode);
+        *p++ = htonl((u32) stat.nlink);
+        *p++ = htonl((u32) nfsd_ruid(rqstp, stat.uid));
+        *p++ = htonl((u32) nfsd_rgid(rqstp, 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));
+        if (is_fsid(fhp, rqstp->rq_reffh))
+                p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
+        else
+                p = xdr_encode_hyper(p, (u64) huge_encode_dev(stat.dev));
+        p = xdr_encode_hyper(p, (u64) stat.ino);
+        p = encode_time3(p, &stat.atime);
+        lease_get_mtime(dentry->d_inode, &time); 
+        p = encode_time3(p, &time);
+        p = encode_time3(p, &stat.ctime);
+
+        return p;
+}
+
+static inline u32 *
+encode_saved_post_attr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
+{
+        struct inode    *inode = fhp->fh_dentry->d_inode;
+
+        /* Attributes to follow */
+        *p++ = xdr_one;
+
+        *p++ = htonl(nfs3_ftypes[(fhp->fh_post_mode & S_IFMT) >> 12]);
+        *p++ = htonl((u32) fhp->fh_post_mode);
+        *p++ = htonl((u32) fhp->fh_post_nlink);
+        *p++ = htonl((u32) nfsd_ruid(rqstp, fhp->fh_post_uid));
+        *p++ = htonl((u32) nfsd_rgid(rqstp, fhp->fh_post_gid));
+        if (S_ISLNK(fhp->fh_post_mode) && fhp->fh_post_size > NFS3_MAXPATHLEN) {
+                p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
+        } else {
+                p = xdr_encode_hyper(p, (u64) fhp->fh_post_size);
+        }
+        p = xdr_encode_hyper(p, ((u64)fhp->fh_post_blocks) << 9);
+        *p++ = fhp->fh_post_rdev[0];
+        *p++ = fhp->fh_post_rdev[1];
+        if (is_fsid(fhp, rqstp->rq_reffh))
+                p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
+        else
+                p = xdr_encode_hyper(p, (u64)huge_encode_dev(inode->i_sb->s_dev));
+        p = xdr_encode_hyper(p, (u64) inode->i_ino);
+        p = encode_time3(p, &fhp->fh_post_atime);
+        p = encode_time3(p, &fhp->fh_post_mtime);
+        p = encode_time3(p, &fhp->fh_post_ctime);
+
+        return p;
+}
+
+/*
+ * 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 u32 *
+encode_post_op_attr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
+{
+        struct dentry *dentry = fhp->fh_dentry;
+        if (dentry && dentry->d_inode != NULL) {
+                *p++ = xdr_one;         /* attributes follow */
+                return encode_fattr3(rqstp, p, fhp);
+        }
+        *p++ = xdr_zero;
+        return p;
+}
+
+/*
+ * Enocde weak cache consistency data
+ */
+static u32 *
+encode_wcc_data(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
+{
+        struct dentry   *dentry = fhp->fh_dentry;
+
+        if (dentry && dentry->d_inode && 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);
+}
+
+
+/*
+ * XDR decode functions
+ */
+int
+nfs3svc_decode_fhandle(struct svc_rqst *rqstp, u32 *p, struct nfsd_fhandle *args)
+{
+        if (!(p = decode_fh(p, &args->fh)))
+                return 0;
+        return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, u32 *p,
+                                        struct nfsd3_sattrargs *args)
+{
+        if (!(p = decode_fh(p, &args->fh))
+         || !(p = decode_sattr3(p, &args->attrs)))
+                return 0;
+
+        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, u32 *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, u32 *p,
+                                        struct nfsd3_accessargs *args)
+{
+        if (!(p = decode_fh(p, &args->fh)))
+                return 0;
+        args->access = ntohl(*p++);
+
+        return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfs3svc_decode_readargs(struct svc_rqst *rqstp, u32 *p,
+                                        struct nfsd3_readargs *args)
+{
+        unsigned int len;
+        int v,pn;
+
+        if (!(p = decode_fh(p, &args->fh))
+         || !(p = xdr_decode_hyper(p, &args->offset)))
+                return 0;
+
+        len = args->count = ntohl(*p++);
+
+        if (len > NFSSVC_MAXBLKSIZE)
+                len = NFSSVC_MAXBLKSIZE;
+
+        /* set up the kvec */
+        v=0;
+        while (len > 0) {
+                pn = rqstp->rq_resused;
+                svc_take_page(rqstp);
+                args->vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
+                args->vec[v].iov_len = len < PAGE_SIZE? len : PAGE_SIZE;
+                len -= args->vec[v].iov_len;
+                v++;
+        }
+        args->vlen = v;
+        return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfs3svc_decode_writeargs(struct svc_rqst *rqstp, u32 *p,
+                                        struct nfsd3_writeargs *args)
+{
+        unsigned int len, v, hdr;
+
+        if (!(p = decode_fh(p, &args->fh))
+         || !(p = xdr_decode_hyper(p, &args->offset)))
+                return 0;
+
+        args->count = ntohl(*p++);
+        args->stable = ntohl(*p++);
+        len = args->len = ntohl(*p++);
+
+        hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
+        if (rqstp->rq_arg.len < len + hdr)
+                return 0;
+
+        args->vec[0].iov_base = (void*)p;
+        args->vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
+
+        if (len > NFSSVC_MAXBLKSIZE)
+                len = NFSSVC_MAXBLKSIZE;
+        v=  0;
+        while (len > args->vec[v].iov_len) {
+                len -= args->vec[v].iov_len;
+                v++;
+                args->vec[v].iov_base = page_address(rqstp->rq_argpages[v]);
+                args->vec[v].iov_len = PAGE_SIZE;
+        }
+        args->vec[v].iov_len = len;
+        args->vlen = v+1;
+
+        return args->count == args->len && args->vec[0].iov_len > 0;
+}
+
+int
+nfs3svc_decode_createargs(struct svc_rqst *rqstp, u32 *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:
+                if (!(p = decode_sattr3(p, &args->attrs)))
+                        return 0;
+                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, u32 *p,
+                                        struct nfsd3_createargs *args)
+{
+        if (!(p = decode_fh(p, &args->fh))
+         || !(p = decode_filename(p, &args->name, &args->len))
+         || !(p = decode_sattr3(p, &args->attrs)))
+                return 0;
+
+        return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, u32 *p,
+                                        struct nfsd3_symlinkargs *args)
+{
+        unsigned int len;
+        int avail;
+        char *old, *new;
+        struct kvec *vec;
+
+        if (!(p = decode_fh(p, &args->ffh))
+         || !(p = decode_filename(p, &args->fname, &args->flen))
+         || !(p = decode_sattr3(p, &args->attrs))
+                )
+                return 0;
+        /* 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
+         */
+        svc_take_page(rqstp);
+        len = ntohl(*p++);
+        if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE)
+                return 0;
+        args->tname = new = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);
+        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 = rqstp->rq_arg.page_len;
+                if (avail > PAGE_SIZE) avail = 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, u32 *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) {
+                if (!(p = decode_sattr3(p, &args->attrs)))
+                        return 0;
+        }
+
+        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, u32 *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, u32 *p,
+                                        struct nfsd3_readlinkargs *args)
+{
+        if (!(p = decode_fh(p, &args->fh)))
+                return 0;
+        svc_take_page(rqstp);
+        args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);
+
+        return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfs3svc_decode_linkargs(struct svc_rqst *rqstp, u32 *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, u32 *p,
+                                        struct nfsd3_readdirargs *args)
+{
+        if (!(p = decode_fh(p, &args->fh)))
+                return 0;
+        p = xdr_decode_hyper(p, &args->cookie);
+        args->verf   = p; p += 2;
+        args->dircount = ~0;
+        args->count  = ntohl(*p++);
+
+        if (args->count > PAGE_SIZE)
+                args->count = PAGE_SIZE;
+
+        svc_take_page(rqstp);
+        args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused-1]);
+
+        return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, u32 *p,
+                                        struct nfsd3_readdirargs *args)
+{
+        int len, pn;
+
+        if (!(p = decode_fh(p, &args->fh)))
+                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 > NFSSVC_MAXBLKSIZE) ? NFSSVC_MAXBLKSIZE :
+                                                  args->count;
+        args->count = len;
+
+        while (len > 0) {
+                pn = rqstp->rq_resused;
+                svc_take_page(rqstp);
+                if (!args->buffer)
+                        args->buffer = page_address(rqstp->rq_respages[pn]);
+                len -= PAGE_SIZE;
+        }
+
+        return xdr_argsize_check(rqstp, p);
+}
+
+int
+nfs3svc_decode_commitargs(struct svc_rqst *rqstp, u32 *p,
+                                        struct nfsd3_commitargs *args)
+{
+        if (!(p = decode_fh(p, &args->fh)))
+                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, u32 *p, void *dummy)
+{
+        return xdr_ressize_check(rqstp, p);
+}
+
+/* GETATTR */
+int
+nfs3svc_encode_attrstat(struct svc_rqst *rqstp, u32 *p,
+                                        struct nfsd3_attrstat *resp)
+{
+        if (resp->status == 0)
+                p = encode_fattr3(rqstp, p, &resp->fh);
+        return xdr_ressize_check(rqstp, p);
+}
+
+/* SETATTR, REMOVE, RMDIR */
+int
+nfs3svc_encode_wccstat(struct svc_rqst *rqstp, u32 *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, u32 *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, u32 *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, u32 *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_restailpage = 0;
+                        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, u32 *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 aswell */
+                rqstp->rq_res.page_len = resp->count;
+                if (resp->count & 3) {
+                        /* need to pad the tail */
+                        rqstp->rq_restailpage = 0;
+                        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, u32 *p,
+                                        struct nfsd3_writeres *resp)
+{
+        p = encode_wcc_data(rqstp, p, &resp->fh);
+        if (resp->status == 0) {
+                *p++ = htonl(resp->count);
+                *p++ = htonl(resp->committed);
+                *p++ = htonl(nfssvc_boot.tv_sec);
+                *p++ = htonl(nfssvc_boot.tv_usec);
+        }
+        return xdr_ressize_check(rqstp, p);
+}
+
+/* CREATE, MKDIR, SYMLINK, MKNOD */
+int
+nfs3svc_encode_createres(struct svc_rqst *rqstp, u32 *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, u32 *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, u32 *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, u32 *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_restailpage = 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 inline u32 *
+encode_entry_baggage(struct nfsd3_readdirres *cd, u32 *p, const char *name,
+             int namlen, ino_t 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 inline u32 *
+encode_entryplus_baggage(struct nfsd3_readdirres *cd, u32 *p,
+                struct svc_fh *fhp)
+{
+                p = encode_post_op_attr(cd->rqstp, p, fhp);
+                *p++ = xdr_one;                 /* yes, a file handle follows */
+                p = encode_fh(p, fhp);
+                fh_put(fhp);
+                return p;
+}
+
+static int
+compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
+                const char *name, int namlen)
+{
+        struct svc_export       *exp;
+        struct dentry           *dparent, *dchild;
+        int rv = 0;
+
+        dparent = cd->fh.fh_dentry;
+        exp  = cd->fh.fh_export;
+
+        fh_init(fhp, NFS3_FHSIZE);
+        if (isdotent(name, namlen)) {
+                if (namlen == 2) {
+                        dchild = dget_parent(dparent);
+                        if (dchild == dparent) {
+                                /* filesystem root - cannot return filehandle for ".." */
+                                dput(dchild);
+                                return 1;
+                        }
+                } else
+                        dchild = dget(dparent);
+        } else
+                dchild = lookup_one_len(name, dparent, namlen);
+        if (IS_ERR(dchild))
+                return 1;
+        if (d_mountpoint(dchild) ||
+            fh_compose(fhp, exp, dchild, &cd->fh) != 0 ||
+            !dchild->d_inode)
+                rv = 1;
+        dput(dchild);
+        return rv;
+}
+
+/*
+ * 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, off_t offset, ino_t ino, unsigned int d_type, int plus)
+{
+        struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
+                                                        common);
+        u32             *p = cd->buffer;
+        caddr_t         curr_page_addr = NULL;
+        int             pn;             /* current page number */
+        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, (u64) offset);
+                }
+        }
+
+        /*
+        dprintk("encode_entry(%.*s @%ld%s)\n",
+                namlen, name, (long) offset, plus? " plus" : "");
+         */
+
+        /* truncate filename if too long */
+        if (namlen > NFS3_MAXNAMLEN)
+                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 (pn=1; pn < cd->rqstp->rq_resused; pn++) {
+                curr_page_addr = page_address(cd->rqstp->rq_respages[pn]);
+
+                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);
+
+                /* throw in readdirplus baggage */
+                if (plus) {
+                        struct svc_fh   fh;
+
+                        if (compose_entry_fh(cd, &fh, name, namlen) > 0) {
+                                *p++ = 0;
+                                *p++ = 0;
+                        } else
+                                p = encode_entryplus_baggage(cd, p, &fh);
+                }
+                num_entry_words = p - cd->buffer;
+        } else if (cd->rqstp->rq_respages[pn+1] != NULL) {
+                /* temporarily encode entry into next page, then move back to
+                 * current and next page in rq_respages[] */
+                u32 *p1, *tmp;
+                int len1, len2;
+
+                /* grab next page for temporary storage of entry */
+                p1 = tmp = page_address(cd->rqstp->rq_respages[pn+1]);
+
+                p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
+
+                /* throw in readdirplus baggage */
+                if (plus) {
+                        struct svc_fh   fh;
+
+                        if (compose_entry_fh(cd, &fh, name, namlen) > 0) {
+                                /* zero out the filehandle */
+                                *p1++ = 0;
+                                *p1++ = 0;
+                        } else
+                                p1 = encode_entryplus_baggage(cd, p1, &fh);
+                }
+
+                /* 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(struct readdir_cd *cd, const char *name,
+                     int namlen, loff_t offset, ino_t ino, unsigned int d_type)
+{
+        return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
+}
+
+int
+nfs3svc_encode_entry_plus(struct readdir_cd *cd, const char *name,
+                          int namlen, loff_t offset, ino_t 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, u32 *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, u32 *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, u32 *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, u32 *p,
+                                        struct nfsd3_commitres *resp)
+{
+        p = encode_wcc_data(rqstp, p, &resp->fh);
+        /* Write verifier */
+        if (resp->status == 0) {
+                *p++ = htonl(nfssvc_boot.tv_sec);
+                *p++ = htonl(nfssvc_boot.tv_usec);
+        }
+        return xdr_ressize_check(rqstp, p);
+}
+
+/*
+ * XDR release functions
+ */
+int
+nfs3svc_release_fhandle(struct svc_rqst *rqstp, u32 *p,
+                                        struct nfsd3_attrstat *resp)
+{
+        fh_put(&resp->fh);
+        return 1;
+}
+
+int
+nfs3svc_release_fhandle2(struct svc_rqst *rqstp, u32 *p,
+                                        struct nfsd3_fhandle_pair *resp)
+{
+        fh_put(&resp->fh1);
+        fh_put(&resp->fh2);
+        return 1;
+}