nfs: don't truncate directory cookies to 32-bits in the NFS server
In NFSv2, the directory cookie was 32-bits. NFSv3 widened it to 64-bits and SVN r22521 widened the corresponding argument in VOP_READDIR, but FreeBSD's NFS server continued to treat the cookies as 32-bits, and 0-extended to fill the field on the wire. Nobody ever noticed, because every in-tree file system generates cookies that fit comfortably within 32-bits. Also, have better type safety for txdr_hyper. Turn it into an inline function that type-checks its arguments. Prevents warnings about shift-count-overflow. PR: 260375 MFC after: 2 weeks Reviewed by: rmacklem Differential Revision: https://reviews.freebsd.org/D33404
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@ -93,9 +93,11 @@
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((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) | \
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(u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
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#define txdr_hyper(f, t) do { \
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((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32)); \
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((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff)); \
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} while (0)
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static inline void
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txdr_hyper(uint64_t f, uint32_t* t)
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{
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t[0] = htonl((u_int32_t)(f >> 32));
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t[1] = htonl((u_int32_t)(f & 0xffffffff));
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}
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#endif /* _NFS_XDR_SUBS_H_ */
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@ -2258,11 +2258,12 @@ nfsrvd_readdir(struct nfsrv_descript *nd, int isdgram,
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(void) nfsm_strtom(nd, dp->d_name, nlen);
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if (nd->nd_flag & ND_NFSV3) {
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NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
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*tl++ = 0;
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} else
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txdr_hyper(*cookiep, tl);
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} else {
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NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
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*tl = txdr_unsigned(*cookiep);
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}
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}
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cpos += dp->d_reclen;
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dp = (struct dirent *)cpos;
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cookiep++;
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@ -2747,8 +2748,7 @@ nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram,
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*tl = txdr_unsigned(dp->d_fileno);
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dirlen += nfsm_strtom(nd, dp->d_name, nlen);
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NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
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*tl++ = 0;
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*tl = txdr_unsigned(*cookiep);
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txdr_hyper(*cookiep, tl);
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nfsrv_postopattr(nd, 0, nvap);
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dirlen += nfsm_fhtom(nd,(u_int8_t *)&nfh,0,1);
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dirlen += (5*NFSX_UNSIGNED+NFSX_V3POSTOPATTR);
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@ -2757,8 +2757,7 @@ nfsrvd_readdirplus(struct nfsrv_descript *nd, int isdgram,
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} else {
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NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
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*tl++ = newnfs_true;
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*tl++ = 0;
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*tl = txdr_unsigned(*cookiep);
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txdr_hyper(*cookiep, tl);
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dirlen += nfsm_strtom(nd, dp->d_name, nlen);
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if (nvp != NULL) {
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supports_nfsv4acls =
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@ -1433,13 +1433,13 @@ nfsrv_fillattr(struct nfsrv_descript *nd, struct nfsvattr *nvap)
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if (nd->nd_flag & ND_NFSV3) {
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fp->fa_type = vtonfsv34_type(nvap->na_type);
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fp->fa_mode = vtonfsv34_mode(nvap->na_mode);
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txdr_hyper(nvap->na_size, &fp->fa3_size);
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txdr_hyper(nvap->na_bytes, &fp->fa3_used);
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txdr_hyper(nvap->na_size, (uint32_t*)&fp->fa3_size);
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txdr_hyper(nvap->na_bytes, (uint32_t*)&fp->fa3_used);
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fp->fa3_rdev.specdata1 = txdr_unsigned(NFSMAJOR(nvap->na_rdev));
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fp->fa3_rdev.specdata2 = txdr_unsigned(NFSMINOR(nvap->na_rdev));
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fp->fa3_fsid.nfsuquad[0] = 0;
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fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(nvap->na_fsid);
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txdr_hyper(nvap->na_fileid, &fp->fa3_fileid);
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txdr_hyper(nvap->na_fileid, (uint32_t*)&fp->fa3_fileid);
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txdr_nfsv3time(&nvap->na_atime, &fp->fa3_atime);
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txdr_nfsv3time(&nvap->na_mtime, &fp->fa3_mtime);
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txdr_nfsv3time(&nvap->na_ctime, &fp->fa3_ctime);
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@ -83,10 +83,12 @@ do { \
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#define fxdr_hyper(f) \
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((((u_quad_t)ntohl(((u_int32_t *)(f))[0])) << 32) | \
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(u_quad_t)(ntohl(((u_int32_t *)(f))[1])))
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#define txdr_hyper(f, t) \
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do { \
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((u_int32_t *)(t))[0] = htonl((u_int32_t)((f) >> 32)); \
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((u_int32_t *)(t))[1] = htonl((u_int32_t)((f) & 0xffffffff)); \
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} while (0)
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static inline void
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txdr_hyper(uint64_t f, uint32_t* t)
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{
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t[0] = htonl((u_int32_t)(f >> 32));
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t[1] = htonl((u_int32_t)(f & 0xffffffff));
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}
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#endif
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