diff options
Diffstat (limited to 'fs/nfsd/nfs4xdr.c')
| -rw-r--r-- | fs/nfsd/nfs4xdr.c | 1933 |
1 files changed, 1106 insertions, 827 deletions
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 18881f34737a..2d305a121f37 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -98,11 +98,6 @@ xdr_error: \ status = nfserr_bad_xdr; \ goto out -#define READ32(x) (x) = ntohl(*p++) -#define READ64(x) do { \ - (x) = (u64)ntohl(*p++) << 32; \ - (x) |= ntohl(*p++); \ -} while (0) #define READMEM(x,nbytes) do { \ x = (char *)p; \ p += XDR_QUADLEN(nbytes); \ @@ -248,17 +243,17 @@ nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) bmval[2] = 0; READ_BUF(4); - READ32(bmlen); + bmlen = be32_to_cpup(p++); if (bmlen > 1000) goto xdr_error; READ_BUF(bmlen << 2); if (bmlen > 0) - READ32(bmval[0]); + bmval[0] = be32_to_cpup(p++); if (bmlen > 1) - READ32(bmval[1]); + bmval[1] = be32_to_cpup(p++); if (bmlen > 2) - READ32(bmval[2]); + bmval[2] = be32_to_cpup(p++); DECODE_TAIL; } @@ -270,6 +265,7 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, { int expected_len, len = 0; u32 dummy32; + u64 sec; char *buf; DECODE_HEAD; @@ -278,12 +274,12 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, return status; READ_BUF(4); - READ32(expected_len); + expected_len = be32_to_cpup(p++); if (bmval[0] & FATTR4_WORD0_SIZE) { READ_BUF(8); len += 8; - READ64(iattr->ia_size); + p = xdr_decode_hyper(p, &iattr->ia_size); iattr->ia_valid |= ATTR_SIZE; } if (bmval[0] & FATTR4_WORD0_ACL) { @@ -291,7 +287,7 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct nfs4_ace *ace; READ_BUF(4); len += 4; - READ32(nace); + nace = be32_to_cpup(p++); if (nace > NFS4_ACL_MAX) return nfserr_fbig; @@ -305,10 +301,10 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, (*acl)->naces = nace; for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { READ_BUF(16); len += 16; - READ32(ace->type); - READ32(ace->flag); - READ32(ace->access_mask); - READ32(dummy32); + ace->type = be32_to_cpup(p++); + ace->flag = be32_to_cpup(p++); + ace->access_mask = be32_to_cpup(p++); + dummy32 = be32_to_cpup(p++); READ_BUF(dummy32); len += XDR_QUADLEN(dummy32) << 2; READMEM(buf, dummy32); @@ -330,14 +326,14 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, if (bmval[1] & FATTR4_WORD1_MODE) { READ_BUF(4); len += 4; - READ32(iattr->ia_mode); + iattr->ia_mode = be32_to_cpup(p++); iattr->ia_mode &= (S_IFMT | S_IALLUGO); iattr->ia_valid |= ATTR_MODE; } if (bmval[1] & FATTR4_WORD1_OWNER) { READ_BUF(4); len += 4; - READ32(dummy32); + dummy32 = be32_to_cpup(p++); READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); @@ -348,7 +344,7 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { READ_BUF(4); len += 4; - READ32(dummy32); + dummy32 = be32_to_cpup(p++); READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); @@ -359,15 +355,16 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { READ_BUF(4); len += 4; - READ32(dummy32); + dummy32 = be32_to_cpup(p++); switch (dummy32) { case NFS4_SET_TO_CLIENT_TIME: /* We require the high 32 bits of 'seconds' to be 0, and we ignore all 32 bits of 'nseconds'. */ READ_BUF(12); len += 12; - READ64(iattr->ia_atime.tv_sec); - READ32(iattr->ia_atime.tv_nsec); + p = xdr_decode_hyper(p, &sec); + iattr->ia_atime.tv_sec = (time_t)sec; + iattr->ia_atime.tv_nsec = be32_to_cpup(p++); if (iattr->ia_atime.tv_nsec >= (u32)1000000000) return nfserr_inval; iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); @@ -382,15 +379,16 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { READ_BUF(4); len += 4; - READ32(dummy32); + dummy32 = be32_to_cpup(p++); switch (dummy32) { case NFS4_SET_TO_CLIENT_TIME: /* We require the high 32 bits of 'seconds' to be 0, and we ignore all 32 bits of 'nseconds'. */ READ_BUF(12); len += 12; - READ64(iattr->ia_mtime.tv_sec); - READ32(iattr->ia_mtime.tv_nsec); + p = xdr_decode_hyper(p, &sec); + iattr->ia_mtime.tv_sec = sec; + iattr->ia_mtime.tv_nsec = be32_to_cpup(p++); if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) return nfserr_inval; iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); @@ -408,13 +406,13 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { READ_BUF(4); len += 4; - READ32(dummy32); /* lfs: we don't use it */ + dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */ READ_BUF(4); len += 4; - READ32(dummy32); /* pi: we don't use it either */ + dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */ READ_BUF(4); len += 4; - READ32(dummy32); + dummy32 = be32_to_cpup(p++); READ_BUF(dummy32); if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN) return nfserr_badlabel; @@ -445,7 +443,7 @@ nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) DECODE_HEAD; READ_BUF(sizeof(stateid_t)); - READ32(sid->si_generation); + sid->si_generation = be32_to_cpup(p++); COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); DECODE_TAIL; @@ -457,7 +455,7 @@ nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access DECODE_HEAD; READ_BUF(4); - READ32(access->ac_req_access); + access->ac_req_access = be32_to_cpup(p++); DECODE_TAIL; } @@ -472,7 +470,7 @@ static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_ /* callback_sec_params4 */ READ_BUF(4); - READ32(nr_secflavs); + nr_secflavs = be32_to_cpup(p++); if (nr_secflavs) cbs->flavor = (u32)(-1); else @@ -480,7 +478,7 @@ static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_ cbs->flavor = 0; for (i = 0; i < nr_secflavs; ++i) { READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); switch (dummy) { case RPC_AUTH_NULL: /* Nothing to read */ @@ -490,21 +488,21 @@ static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_ case RPC_AUTH_UNIX: READ_BUF(8); /* stamp */ - READ32(dummy); + dummy = be32_to_cpup(p++); /* machine name */ - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy); SAVEMEM(machine_name, dummy); /* uid, gid */ READ_BUF(8); - READ32(uid); - READ32(gid); + uid = be32_to_cpup(p++); + gid = be32_to_cpup(p++); /* more gids */ READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy * 4); if (cbs->flavor == (u32)(-1)) { kuid_t kuid = make_kuid(&init_user_ns, uid); @@ -524,14 +522,14 @@ static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_ "not supported!\n"); READ_BUF(8); /* gcbp_service */ - READ32(dummy); + dummy = be32_to_cpup(p++); /* gcbp_handle_from_server */ - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy); p += XDR_QUADLEN(dummy); /* gcbp_handle_from_client */ READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy); break; default: @@ -547,7 +545,7 @@ static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, stru DECODE_HEAD; READ_BUF(4); - READ32(bc->bc_cb_program); + bc->bc_cb_program = be32_to_cpup(p++); nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); DECODE_TAIL; @@ -559,7 +557,7 @@ static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); - READ32(bcts->dir); + bcts->dir = be32_to_cpup(p++); /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker * could help us figure out we should be using it. */ DECODE_TAIL; @@ -571,7 +569,7 @@ nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) DECODE_HEAD; READ_BUF(4); - READ32(close->cl_seqid); + close->cl_seqid = be32_to_cpup(p++); return nfsd4_decode_stateid(argp, &close->cl_stateid); DECODE_TAIL; @@ -584,8 +582,8 @@ nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit DECODE_HEAD; READ_BUF(12); - READ64(commit->co_offset); - READ32(commit->co_count); + p = xdr_decode_hyper(p, &commit->co_offset); + commit->co_count = be32_to_cpup(p++); DECODE_TAIL; } @@ -596,19 +594,19 @@ nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create DECODE_HEAD; READ_BUF(4); - READ32(create->cr_type); + create->cr_type = be32_to_cpup(p++); switch (create->cr_type) { case NF4LNK: READ_BUF(4); - READ32(create->cr_linklen); + create->cr_linklen = be32_to_cpup(p++); READ_BUF(create->cr_linklen); SAVEMEM(create->cr_linkname, create->cr_linklen); break; case NF4BLK: case NF4CHR: READ_BUF(8); - READ32(create->cr_specdata1); - READ32(create->cr_specdata2); + create->cr_specdata1 = be32_to_cpup(p++); + create->cr_specdata2 = be32_to_cpup(p++); break; case NF4SOCK: case NF4FIFO: @@ -618,7 +616,7 @@ nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create } READ_BUF(4); - READ32(create->cr_namelen); + create->cr_namelen = be32_to_cpup(p++); READ_BUF(create->cr_namelen); SAVEMEM(create->cr_name, create->cr_namelen); if ((status = check_filename(create->cr_name, create->cr_namelen))) @@ -650,7 +648,7 @@ nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) DECODE_HEAD; READ_BUF(4); - READ32(link->li_namelen); + link->li_namelen = be32_to_cpup(p++); READ_BUF(link->li_namelen); SAVEMEM(link->li_name, link->li_namelen); if ((status = check_filename(link->li_name, link->li_namelen))) @@ -668,24 +666,24 @@ nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) * type, reclaim(boolean), offset, length, new_lock_owner(boolean) */ READ_BUF(28); - READ32(lock->lk_type); + lock->lk_type = be32_to_cpup(p++); if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) goto xdr_error; - READ32(lock->lk_reclaim); - READ64(lock->lk_offset); - READ64(lock->lk_length); - READ32(lock->lk_is_new); + lock->lk_reclaim = be32_to_cpup(p++); + p = xdr_decode_hyper(p, &lock->lk_offset); + p = xdr_decode_hyper(p, &lock->lk_length); + lock->lk_is_new = be32_to_cpup(p++); if (lock->lk_is_new) { READ_BUF(4); - READ32(lock->lk_new_open_seqid); + lock->lk_new_open_seqid = be32_to_cpup(p++); status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); if (status) return status; READ_BUF(8 + sizeof(clientid_t)); - READ32(lock->lk_new_lock_seqid); + lock->lk_new_lock_seqid = be32_to_cpup(p++); COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); - READ32(lock->lk_new_owner.len); + lock->lk_new_owner.len = be32_to_cpup(p++); READ_BUF(lock->lk_new_owner.len); READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); } else { @@ -693,7 +691,7 @@ nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) if (status) return status; READ_BUF(4); - READ32(lock->lk_old_lock_seqid); + lock->lk_old_lock_seqid = be32_to_cpup(p++); } DECODE_TAIL; @@ -705,13 +703,13 @@ nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) DECODE_HEAD; READ_BUF(32); - READ32(lockt->lt_type); + lockt->lt_type = be32_to_cpup(p++); if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) goto xdr_error; - READ64(lockt->lt_offset); - READ64(lockt->lt_length); + p = xdr_decode_hyper(p, &lockt->lt_offset); + p = xdr_decode_hyper(p, &lockt->lt_length); COPYMEM(&lockt->lt_clientid, 8); - READ32(lockt->lt_owner.len); + lockt->lt_owner.len = be32_to_cpup(p++); READ_BUF(lockt->lt_owner.len); READMEM(lockt->lt_owner.data, lockt->lt_owner.len); @@ -724,16 +722,16 @@ nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) DECODE_HEAD; READ_BUF(8); - READ32(locku->lu_type); + locku->lu_type = be32_to_cpup(p++); if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) goto xdr_error; - READ32(locku->lu_seqid); + locku->lu_seqid = be32_to_cpup(p++); status = nfsd4_decode_stateid(argp, &locku->lu_stateid); if (status) return status; READ_BUF(16); - READ64(locku->lu_offset); - READ64(locku->lu_length); + p = xdr_decode_hyper(p, &locku->lu_offset); + p = xdr_decode_hyper(p, &locku->lu_length); DECODE_TAIL; } @@ -744,7 +742,7 @@ nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup DECODE_HEAD; READ_BUF(4); - READ32(lookup->lo_len); + lookup->lo_len = be32_to_cpup(p++); READ_BUF(lookup->lo_len); SAVEMEM(lookup->lo_name, lookup->lo_len); if ((status = check_filename(lookup->lo_name, lookup->lo_len))) @@ -759,7 +757,7 @@ static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *sh u32 w; READ_BUF(4); - READ32(w); + w = be32_to_cpup(p++); *share_access = w & NFS4_SHARE_ACCESS_MASK; *deleg_want = w & NFS4_SHARE_WANT_MASK; if (deleg_when) @@ -811,7 +809,7 @@ static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) __be32 *p; READ_BUF(4); - READ32(*x); + *x = be32_to_cpup(p++); /* Note: unlinke access bits, deny bits may be zero. */ if (*x & ~NFS4_SHARE_DENY_BOTH) return nfserr_bad_xdr; @@ -825,7 +823,7 @@ static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_ne __be32 *p; READ_BUF(4); - READ32(o->len); + o->len = be32_to_cpup(p++); if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) return nfserr_bad_xdr; @@ -850,7 +848,7 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) open->op_xdr_error = 0; /* seqid, share_access, share_deny, clientid, ownerlen */ READ_BUF(4); - READ32(open->op_seqid); + open->op_seqid = be32_to_cpup(p++); /* decode, yet ignore deleg_when until supported */ status = nfsd4_decode_share_access(argp, &open->op_share_access, &open->op_deleg_want, &dummy); @@ -865,13 +863,13 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) if (status) goto xdr_error; READ_BUF(4); - READ32(open->op_create); + open->op_create = be32_to_cpup(p++); switch (open->op_create) { case NFS4_OPEN_NOCREATE: break; case NFS4_OPEN_CREATE: READ_BUF(4); - READ32(open->op_createmode); + open->op_createmode = be32_to_cpup(p++); switch (open->op_createmode) { case NFS4_CREATE_UNCHECKED: case NFS4_CREATE_GUARDED: @@ -904,12 +902,12 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) /* open_claim */ READ_BUF(4); - READ32(open->op_claim_type); + open->op_claim_type = be32_to_cpup(p++); switch (open->op_claim_type) { case NFS4_OPEN_CLAIM_NULL: case NFS4_OPEN_CLAIM_DELEGATE_PREV: READ_BUF(4); - READ32(open->op_fname.len); + open->op_fname.len = be32_to_cpup(p++); READ_BUF(open->op_fname.len); SAVEMEM(open->op_fname.data, open->op_fname.len); if ((status = check_filename(open->op_fname.data, open->op_fname.len))) @@ -917,14 +915,14 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) break; case NFS4_OPEN_CLAIM_PREVIOUS: READ_BUF(4); - READ32(open->op_delegate_type); + open->op_delegate_type = be32_to_cpup(p++); break; case NFS4_OPEN_CLAIM_DELEGATE_CUR: status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); if (status) return status; READ_BUF(4); - READ32(open->op_fname.len); + open->op_fname.len = be32_to_cpup(p++); READ_BUF(open->op_fname.len); SAVEMEM(open->op_fname.data, open->op_fname.len); if ((status = check_filename(open->op_fname.data, open->op_fname.len))) @@ -962,7 +960,7 @@ nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_con if (status) return status; READ_BUF(4); - READ32(open_conf->oc_seqid); + open_conf->oc_seqid = be32_to_cpup(p++); DECODE_TAIL; } @@ -976,7 +974,7 @@ nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_d if (status) return status; READ_BUF(4); - READ32(open_down->od_seqid); + open_down->od_seqid = be32_to_cpup(p++); status = nfsd4_decode_share_access(argp, &open_down->od_share_access, &open_down->od_deleg_want, NULL); if (status) @@ -993,7 +991,7 @@ nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) DECODE_HEAD; READ_BUF(4); - READ32(putfh->pf_fhlen); + putfh->pf_fhlen = be32_to_cpup(p++); if (putfh->pf_fhlen > NFS4_FHSIZE) goto xdr_error; READ_BUF(putfh->pf_fhlen); @@ -1019,8 +1017,8 @@ nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) if (status) return status; READ_BUF(12); - READ64(read->rd_offset); - READ32(read->rd_length); + p = xdr_decode_hyper(p, &read->rd_offset); + read->rd_length = be32_to_cpup(p++); DECODE_TAIL; } @@ -1031,10 +1029,10 @@ nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *read DECODE_HEAD; READ_BUF(24); - READ64(readdir->rd_cookie); + p = xdr_decode_hyper(p, &readdir->rd_cookie); COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); - READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ - READ32(readdir->rd_maxcount); + readdir->rd_dircount = be32_to_cpup(p++); + readdir->rd_maxcount = be32_to_cpup(p++); if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) goto out; @@ -1047,7 +1045,7 @@ nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove DECODE_HEAD; READ_BUF(4); - READ32(remove->rm_namelen); + remove->rm_namelen = be32_to_cpup(p++); READ_BUF(remove->rm_namelen); SAVEMEM(remove->rm_name, remove->rm_namelen); if ((status = check_filename(remove->rm_name, remove->rm_namelen))) @@ -1062,10 +1060,10 @@ nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename DECODE_HEAD; READ_BUF(4); - READ32(rename->rn_snamelen); + rename->rn_snamelen = be32_to_cpup(p++); READ_BUF(rename->rn_snamelen + 4); SAVEMEM(rename->rn_sname, rename->rn_snamelen); - READ32(rename->rn_tnamelen); + rename->rn_tnamelen = be32_to_cpup(p++); READ_BUF(rename->rn_tnamelen); SAVEMEM(rename->rn_tname, rename->rn_tnamelen); if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) @@ -1097,7 +1095,7 @@ nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, DECODE_HEAD; READ_BUF(4); - READ32(secinfo->si_namelen); + secinfo->si_namelen = be32_to_cpup(p++); READ_BUF(secinfo->si_namelen); SAVEMEM(secinfo->si_name, secinfo->si_namelen); status = check_filename(secinfo->si_name, secinfo->si_namelen); @@ -1113,7 +1111,7 @@ nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, DECODE_HEAD; READ_BUF(4); - READ32(sin->sin_style); + sin->sin_style = be32_to_cpup(p++); DECODE_TAIL; } @@ -1144,16 +1142,16 @@ nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclient if (status) return nfserr_bad_xdr; READ_BUF(8); - READ32(setclientid->se_callback_prog); - READ32(setclientid->se_callback_netid_len); + setclientid->se_callback_prog = be32_to_cpup(p++); + setclientid->se_callback_netid_len = be32_to_cpup(p++); READ_BUF(setclientid->se_callback_netid_len + 4); SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); - READ32(setclientid->se_callback_addr_len); + setclientid->se_callback_addr_len = be32_to_cpup(p++); READ_BUF(setclientid->se_callback_addr_len + 4); SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); - READ32(setclientid->se_callback_ident); + setclientid->se_callback_ident = be32_to_cpup(p++); DECODE_TAIL; } @@ -1186,7 +1184,7 @@ nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify * nfsd4_proc_verify */ READ_BUF(4); - READ32(verify->ve_attrlen); + verify->ve_attrlen = be32_to_cpup(p++); READ_BUF(verify->ve_attrlen); SAVEMEM(verify->ve_attrval, verify->ve_attrlen); @@ -1204,11 +1202,11 @@ nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) if (status) return status; READ_BUF(16); - READ64(write->wr_offset); - READ32(write->wr_stable_how); + p = xdr_decode_hyper(p, &write->wr_offset); + write->wr_stable_how = be32_to_cpup(p++); if (write->wr_stable_how > 2) goto xdr_error; - READ32(write->wr_buflen); + write->wr_buflen = be32_to_cpup(p++); /* Sorry .. no magic macros for this.. * * READ_BUF(write->wr_buflen); @@ -1254,7 +1252,7 @@ nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_rel READ_BUF(12); COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); - READ32(rlockowner->rl_owner.len); + rlockowner->rl_owner.len = be32_to_cpup(p++); READ_BUF(rlockowner->rl_owner.len); READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); @@ -1278,63 +1276,63 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, return nfserr_bad_xdr; READ_BUF(4); - READ32(exid->flags); + exid->flags = be32_to_cpup(p++); /* Ignore state_protect4_a */ READ_BUF(4); - READ32(exid->spa_how); + exid->spa_how = be32_to_cpup(p++); switch (exid->spa_how) { case SP4_NONE: break; case SP4_MACH_CRED: /* spo_must_enforce */ READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy * 4); p += dummy; /* spo_must_allow */ READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy * 4); p += dummy; break; case SP4_SSV: /* ssp_ops */ READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy * 4); p += dummy; READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy * 4); p += dummy; /* ssp_hash_algs<> */ READ_BUF(4); - READ32(tmp); + tmp = be32_to_cpup(p++); while (tmp--) { READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy); p += XDR_QUADLEN(dummy); } /* ssp_encr_algs<> */ READ_BUF(4); - READ32(tmp); + tmp = be32_to_cpup(p++); while (tmp--) { READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy); p += XDR_QUADLEN(dummy); } /* ssp_window and ssp_num_gss_handles */ READ_BUF(8); - READ32(dummy); - READ32(dummy); + dummy = be32_to_cpup(p++); + dummy = be32_to_cpup(p++); break; default: goto xdr_error; @@ -1342,7 +1340,7 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, /* Ignore Implementation ID */ READ_BUF(4); /* nfs_impl_id4 array length */ - READ32(dummy); + dummy = be32_to_cpup(p++); if (dummy > 1) goto xdr_error; @@ -1350,13 +1348,13 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, if (dummy == 1) { /* nii_domain */ READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy); p += XDR_QUADLEN(dummy); /* nii_name */ READ_BUF(4); - READ32(dummy); + dummy = be32_to_cpup(p++); READ_BUF(dummy); p += XDR_QUADLEN(dummy); @@ -1376,21 +1374,21 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, READ_BUF(16); COPYMEM(&sess->clientid, 8); - READ32(sess->seqid); - READ32(sess->flags); + sess->seqid = be32_to_cpup(p++); + sess->flags = be32_to_cpup(p++); /* Fore channel attrs */ READ_BUF(28); - READ32(dummy); /* headerpadsz is always 0 */ - READ32(sess->fore_channel.maxreq_sz); - READ32(sess->fore_channel.maxresp_sz); - READ32(sess->fore_channel.maxresp_cached); - READ32(sess->fore_channel.maxops); - READ32(sess->fore_channel.maxreqs); - READ32(sess->fore_channel.nr_rdma_attrs); + dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ + sess->fore_channel.maxreq_sz = be32_to_cpup(p++); + sess->fore_channel.maxresp_sz = be32_to_cpup(p++); + sess->fore_channel.maxresp_cached = be32_to_cpup(p++); + sess->fore_channel.maxops = be32_to_cpup(p++); + sess->fore_channel.maxreqs = be32_to_cpup(p++); + sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); if (sess->fore_channel.nr_rdma_attrs == 1) { READ_BUF(4); - READ32(sess->fore_channel.rdma_attrs); + sess->fore_channel.rdma_attrs = be32_to_cpup(p++); } else if (sess->fore_channel.nr_rdma_attrs > 1) { dprintk("Too many fore channel attr bitmaps!\n"); goto xdr_error; @@ -1398,23 +1396,23 @@ nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, /* Back channel attrs */ READ_BUF(28); - READ32(dummy); /* headerpadsz is always 0 */ - READ32(sess->back_channel.maxreq_sz); - READ32(sess->back_channel.maxresp_sz); - READ32(sess->back_channel.maxresp_cached); - READ32(sess->back_channel.maxops); - READ32(sess->back_channel.maxreqs); - READ32(sess->back_channel.nr_rdma_attrs); + dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ + sess->back_channel.maxreq_sz = be32_to_cpup(p++); + sess->back_channel.maxresp_sz = be32_to_cpup(p++); + sess->back_channel.maxresp_cached = be32_to_cpup(p++); + sess->back_channel.maxops = be32_to_cpup(p++); + sess->back_channel.maxreqs = be32_to_cpup(p++); + sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); if (sess->back_channel.nr_rdma_attrs == 1) { READ_BUF(4); - READ32(sess->back_channel.rdma_attrs); + sess->back_channel.rdma_attrs = be32_to_cpup(p++); } else if (sess->back_channel.nr_rdma_attrs > 1) { dprintk("Too many back channel attr bitmaps!\n"); goto xdr_error; } READ_BUF(4); - READ32(sess->callback_prog); + sess->callback_prog = be32_to_cpup(p++); nfsd4_decode_cb_sec(argp, &sess->cb_sec); DECODE_TAIL; } @@ -1437,7 +1435,7 @@ nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, DECODE_HEAD; READ_BUF(sizeof(stateid_t)); - READ32(free_stateid->fr_stateid.si_generation); + free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); DECODE_TAIL; @@ -1451,10 +1449,10 @@ nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); - READ32(seq->seqid); - READ32(seq->slotid); - READ32(seq->maxslots); - READ32(seq->cachethis); + seq->seqid = be32_to_cpup(p++); + seq->slotid = be32_to_cpup(p++); + seq->maxslots = be32_to_cpup(p++); + seq->cachethis = be32_to_cpup(p++); DECODE_TAIL; } @@ -1511,7 +1509,7 @@ static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, str DECODE_HEAD; READ_BUF(4); - READ32(rc->rca_one_fs); + rc->rca_one_fs = be32_to_cpup(p++); DECODE_TAIL; } @@ -1605,47 +1603,25 @@ nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) return true; } -/* - * Return a rough estimate of the maximum possible reply size. Note the - * estimate includes rpc headers so is meant to be passed to - * svc_reserve, not svc_reserve_auth. - * - * Also note the current compound encoding permits only one operation to - * use pages beyond the first one, so the maximum possible length is the - * maximum over these values, not the sum. - */ -static int nfsd4_max_reply(u32 opnum) -{ - switch (opnum) { - case OP_READLINK: - case OP_READDIR: - /* - * Both of these ops take a single page for data and put - * the head and tail in another page: - */ - return 2 * PAGE_SIZE; - case OP_READ: - return INT_MAX; - default: - return PAGE_SIZE; - } -} - static __be32 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) { DECODE_HEAD; struct nfsd4_op *op; bool cachethis = false; - int max_reply = PAGE_SIZE; + int auth_slack= argp->rqstp->rq_auth_slack; + int max_reply = auth_slack + 8; /* opcnt, status */ + int readcount = 0; + int readbytes = 0; int i; READ_BUF(4); - READ32(argp->taglen); + argp->taglen = be32_to_cpup(p++); READ_BUF(argp->taglen + 8); SAVEMEM(argp->tag, argp->taglen); - READ32(argp->minorversion); - READ32(argp->opcnt); + argp->minorversion = be32_to_cpup(p++); + argp->opcnt = be32_to_cpup(p++); + max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); if (argp->taglen > NFSD4_MAX_TAGLEN) goto xdr_error; @@ -1669,7 +1645,7 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp) op->replay = NULL; READ_BUF(4); - READ32(op->opnum); + op->opnum = be32_to_cpup(p++); if (nfsd4_opnum_in_range(argp, op)) op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); @@ -1677,97 +1653,82 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp) op->opnum = OP_ILLEGAL; op->status = nfserr_op_illegal; } - - if (op->status) { - argp->opcnt = i+1; - break; - } /* * We'll try to cache the result in the DRC if any one * op in the compound wants to be cached: */ cachethis |= nfsd4_cache_this_op(op); - max_reply = max(max_reply, nfsd4_max_reply(op->opnum)); + if (op->opnum == OP_READ) { + readcount++; + readbytes += nfsd4_max_reply(argp->rqstp, op); + } else + max_reply += nfsd4_max_reply(argp->rqstp, op); + + if (op->status) { + argp->opcnt = i+1; + break; + } } /* Sessions make the DRC unnecessary: */ if (argp->minorversion) cachethis = false; - if (max_reply != INT_MAX) - svc_reserve(argp->rqstp, max_reply); + svc_reserve(argp->rqstp, max_reply + readbytes); argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; - DECODE_TAIL; -} - -#define WRITE32(n) *p++ = htonl(n) -#define WRITE64(n) do { \ - *p++ = htonl((u32)((n) >> 32)); \ - *p++ = htonl((u32)(n)); \ -} while (0) -#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ - *(p + XDR_QUADLEN(nbytes) -1) = 0; \ - memcpy(p, ptr, nbytes); \ - p += XDR_QUADLEN(nbytes); \ -}} while (0) - -static void write32(__be32 **p, u32 n) -{ - *(*p)++ = htonl(n); -} + if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) + argp->rqstp->rq_splice_ok = false; -static void write64(__be32 **p, u64 n) -{ - write32(p, (n >> 32)); - write32(p, (u32)n); + DECODE_TAIL; } -static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) +static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode) { if (IS_I_VERSION(inode)) { - write64(p, inode->i_version); + p = xdr_encode_hyper(p, inode->i_version); } else { - write32(p, stat->ctime.tv_sec); - write32(p, stat->ctime.tv_nsec); + *p++ = cpu_to_be32(stat->ctime.tv_sec); + *p++ = cpu_to_be32(stat->ctime.tv_nsec); } + return p; } -static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) +static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) { - write32(p, c->atomic); + *p++ = cpu_to_be32(c->atomic); if (c->change_supported) { - write64(p, c->before_change); - write64(p, c->after_change); + p = xdr_encode_hyper(p, c->before_change); + p = xdr_encode_hyper(p, c->after_change); } else { - write32(p, c->before_ctime_sec); - write32(p, c->before_ctime_nsec); - write32(p, c->after_ctime_sec); - write32(p, c->after_ctime_nsec); + *p++ = cpu_to_be32(c->before_ctime_sec); + *p++ = cpu_to_be32(c->before_ctime_nsec); + *p++ = cpu_to_be32(c->after_ctime_sec); + *p++ = cpu_to_be32(c->after_ctime_nsec); } + return p; } -#define RESERVE_SPACE(nbytes) do { \ - p = resp->p; \ - BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ -} while (0) -#define ADJUST_ARGS() resp->p = p - /* Encode as an array of strings the string given with components * separated @sep, escaped with esc_enter and esc_exit. */ -static __be32 nfsd4_encode_components_esc(char sep, char *components, - __be32 **pp, int *buflen, - char esc_enter, char esc_exit) +static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, + char *components, char esc_enter, + char esc_exit) { - __be32 *p = *pp; - __be32 *countp = p; + __be32 *p; + __be32 pathlen; + int pathlen_offset; int strlen, count=0; char *str, *end, *next; dprintk("nfsd4_encode_components(%s)\n", components); - if ((*buflen -= 4) < 0) + + pathlen_offset = xdr->buf->len; + p = xdr_reserve_space(xdr, 4); + if (!p) return nfserr_resource; - WRITE32(0); /* We will fill this in with @count later */ + p++; /* We will fill this in with @count later */ + end = str = components; while (*end) { bool found_esc = false; @@ -1789,59 +1750,57 @@ static __be32 nfsd4_encode_components_esc(char sep, char *components, strlen = end - str; if (strlen) { - if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) + p = xdr_reserve_space(xdr, strlen + 4); + if (!p) return nfserr_resource; - WRITE32(strlen); - WRITEMEM(str, strlen); + p = xdr_encode_opaque(p, str, strlen); count++; } else end++; str = end; } - *pp = p; - p = countp; - WRITE32(count); + pathlen = htonl(xdr->buf->len - pathlen_offset); + write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); return 0; } /* Encode as an array of strings the string given with components * separated @sep. */ -static __be32 nfsd4_encode_components(char sep, char *components, - __be32 **pp, int *buflen) +static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, + char *components) { - return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0); + return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); } /* * encode a location element of a fs_locations structure */ -static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, - __be32 **pp, int *buflen) +static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, + struct nfsd4_fs_location *location) { __be32 status; - __be32 *p = *pp; - status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen, + status = nfsd4_encode_components_esc(xdr, ':', location->hosts, '[', ']'); if (status) return status; - status = nfsd4_encode_components('/', location->path, &p, buflen); + status = nfsd4_encode_components(xdr, '/', location->path); if (status) return status; - *pp = p; return 0; } /* * Encode a path in RFC3530 'pathname4' format */ -static __be32 nfsd4_encode_path(const struct path *root, - const struct path *path, __be32 **pp, int *buflen) +static __be32 nfsd4_encode_path(struct xdr_stream *xdr, + const struct path *root, + const struct path *path) { struct path cur = *path; - __be32 *p = *pp; + __be32 *p; struct dentry **components = NULL; unsigned int ncomponents = 0; __be32 err = nfserr_jukebox; @@ -1872,11 +1831,11 @@ static __be32 nfsd4_encode_path(const struct path *root, components[ncomponents++] = cur.dentry; cur.dentry = dget_parent(cur.dentry); } - - *buflen -= 4; - if (*buflen < 0) + err = nfserr_resource; + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_free; - WRITE32(ncomponents); + *p++ = cpu_to_be32(ncomponents); while (ncomponents) { struct dentry *dentry = components[ncomponents - 1]; @@ -1884,20 +1843,18 @@ static __be32 nfsd4_encode_path(const struct path *root, spin_lock(&dentry->d_lock); len = dentry->d_name.len; - *buflen -= 4 + (XDR_QUADLEN(len) << 2); - if (*buflen < 0) { + p = xdr_reserve_space(xdr, len + 4); + if (!p) { spin_unlock(&dentry->d_lock); goto out_free; } - WRITE32(len); - WRITEMEM(dentry->d_name.name, len); + p = xdr_encode_opaque(p, dentry->d_name.name, len); dprintk("/%s", dentry->d_name.name); spin_unlock(&dentry->d_lock); dput(dentry); ncomponents--; } - *pp = p; err = 0; out_free: dprintk(")\n"); @@ -1908,8 +1865,8 @@ out_free: return err; } -static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp, - const struct path *path, __be32 **pp, int *buflen) +static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, + struct svc_rqst *rqstp, const struct path *path) { struct svc_export *exp_ps; __be32 res; @@ -1917,7 +1874,7 @@ static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp, exp_ps = rqst_find_fsidzero_export(rqstp); if (IS_ERR(exp_ps)) return nfserrno(PTR_ERR(exp_ps)); - res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen); + res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); exp_put(exp_ps); return res; } @@ -1925,28 +1882,26 @@ static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp, /* * encode a fs_locations structure */ -static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, - struct svc_export *exp, - __be32 **pp, int *buflen) +static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, + struct svc_rqst *rqstp, struct svc_export *exp) { __be32 status; int i; - __be32 *p = *pp; + __be32 *p; struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; - status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen); + status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); if (status) return status; - if ((*buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) return nfserr_resource; - WRITE32(fslocs->locations_count); + *p++ = cpu_to_be32(fslocs->locations_count); for (i=0; i<fslocs->locations_count; i++) { - status = nfsd4_encode_fs_location4(&fslocs->locations[i], - &p, buflen); + status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); if (status) return status; } - *pp = p; return 0; } @@ -1965,15 +1920,15 @@ static u32 nfs4_file_type(umode_t mode) } static inline __be32 -nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace, - __be32 **p, int *buflen) +nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, + struct nfs4_ace *ace) { if (ace->whotype != NFS4_ACL_WHO_NAMED) - return nfs4_acl_write_who(ace->whotype, p, buflen); + return nfs4_acl_write_who(xdr, ace->whotype); else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) - return nfsd4_encode_group(rqstp, ace->who_gid, p, buflen); + return nfsd4_encode_group(xdr, rqstp, ace->who_gid); else - return nfsd4_encode_user(rqstp, ace->who_uid, p, buflen); + return nfsd4_encode_user(xdr, rqstp, ace->who_uid); } #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ @@ -1982,31 +1937,28 @@ nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace, #ifdef CONFIG_NFSD_V4_SECURITY_LABEL static inline __be32 -nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen) +nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, + void *context, int len) { - __be32 *p = *pp; + __be32 *p; - if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4)) + p = xdr_reserve_space(xdr, len + 4 + 4 + 4); + if (!p) return nfserr_resource; /* * For now we use a 0 here to indicate the null translation; in * the future we may place a call to translation code here. */ - if ((*buflen -= 8) < 0) - return nfserr_resource; - - WRITE32(0); /* lfs */ - WRITE32(0); /* pi */ + *p++ = cpu_to_be32(0); /* lfs */ + *p++ = cpu_to_be32(0); /* pi */ p = xdr_encode_opaque(p, context, len); - *buflen -= (XDR_QUADLEN(len) << 2) + 4; - - *pp = p; return 0; } #else static inline __be32 -nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen) +nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, + void *context, int len) { return 0; } #endif @@ -2045,12 +1997,11 @@ static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) /* * Note: @fhp can be NULL; in this case, we might have to compose the filehandle * ourselves. - * - * countp is the buffer size in _words_ */ -__be32 -nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, - struct dentry *dentry, __be32 **buffer, int count, u32 *bmval, +static __be32 +nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, + struct svc_export *exp, + struct dentry *dentry, u32 *bmval, struct svc_rqst *rqstp, int ignore_crossmnt) { u32 bmval0 = bmval[0]; @@ -2059,12 +2010,13 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, struct kstat stat; struct svc_fh *tempfh = NULL; struct kstatfs statfs; - int buflen = count << 2; - __be32 *attrlenp; + __be32 *p; + int starting_len = xdr->buf->len; + int attrlen_offset; + __be32 attrlen; u32 dummy; u64 dummy64; u32 rdattr_err = 0; - __be32 *p = *buffer; __be32 status; int err; int aclsupport = 0; @@ -2095,8 +2047,8 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, err = vfs_getattr(&path, &stat); if (err) goto out_nfserr; - if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | - FATTR4_WORD0_MAXNAME)) || + if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | + FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL))) { err = vfs_statfs(&path, &statfs); @@ -2145,25 +2097,33 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ if (bmval2) { - if ((buflen -= 16) < 0) + p = xdr_reserve_space(xdr, 16); + if (!p) goto out_resource; - WRITE32(3); - WRITE32(bmval0); - WRITE32(bmval1); - WRITE32(bmval2); + *p++ = cpu_to_be32(3); + *p++ = cpu_to_be32(bmval0); + *p++ = cpu_to_be32(bmval1); + *p++ = cpu_to_be32(bmval2); } else if (bmval1) { - if ((buflen -= 12) < 0) + p = xdr_reserve_space(xdr, 12); + if (!p) goto out_resource; - WRITE32(2); - WRITE32(bmval0); - WRITE32(bmval1); + *p++ = cpu_to_be32(2); + *p++ = cpu_to_be32(bmval0); + *p++ = cpu_to_be32(bmval1); } else { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE32(1); - WRITE32(bmval0); + *p++ = cpu_to_be32(1); + *p++ = cpu_to_be32(bmval0); } - attrlenp = p++; /* to be backfilled later */ + + attrlen_offset = xdr->buf->len; + p = xdr_reserve_space(xdr, 4); + if (!p) + goto out_resource; + p++; /* to be backfilled later */ if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { u32 word0 = nfsd_suppattrs0(minorversion); @@ -2175,296 +2135,343 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, if (!contextsupport) word2 &= ~FATTR4_WORD2_SECURITY_LABEL; if (!word2) { - if ((buflen -= 12) < 0) + p = xdr_reserve_space(xdr, 12); + if (!p) goto out_resource; - WRITE32(2); - WRITE32(word0); - WRITE32(word1); + *p++ = cpu_to_be32(2); + *p++ = cpu_to_be32(word0); + *p++ = cpu_to_be32(word1); } else { - if ((buflen -= 16) < 0) + p = xdr_reserve_space(xdr, 16); + if (!p) goto out_resource; - WRITE32(3); - WRITE32(word0); - WRITE32(word1); - WRITE32(word2); + *p++ = cpu_to_be32(3); + *p++ = cpu_to_be32(word0); + *p++ = cpu_to_be32(word1); + *p++ = cpu_to_be32(word2); } } if (bmval0 & FATTR4_WORD0_TYPE) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; dummy = nfs4_file_type(stat.mode); if (dummy == NF4BAD) { status = nfserr_serverfault; goto out; } - WRITE32(dummy); + *p++ = cpu_to_be32(dummy); } if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) - WRITE32(NFS4_FH_PERSISTENT); + *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); else - WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); + *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| + NFS4_FH_VOL_RENAME); } if (bmval0 & FATTR4_WORD0_CHANGE) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - write_change(&p, &stat, dentry->d_inode); + p = encode_change(p, &stat, dentry->d_inode); } if (bmval0 & FATTR4_WORD0_SIZE) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE64(stat.size); + p = xdr_encode_hyper(p, stat.size); } if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(1); + *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(1); + *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(0); + *p++ = cpu_to_be32(0); } if (bmval0 & FATTR4_WORD0_FSID) { - if ((buflen -= 16) < 0) + p = xdr_reserve_space(xdr, 16); + if (!p) goto out_resource; if (exp->ex_fslocs.migrated) { - WRITE64(NFS4_REFERRAL_FSID_MAJOR); - WRITE64(NFS4_REFERRAL_FSID_MINOR); + p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); + p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); } else switch(fsid_source(fhp)) { case FSIDSOURCE_FSID: - WRITE64((u64)exp->ex_fsid); - WRITE64((u64)0); + p = xdr_encode_hyper(p, (u64)exp->ex_fsid); + p = xdr_encode_hyper(p, (u64)0); break; case FSIDSOURCE_DEV: - WRITE32(0); - WRITE32(MAJOR(stat.dev)); - WRITE32(0); - WRITE32(MINOR(stat.dev)); + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(MAJOR(stat.dev)); + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(MINOR(stat.dev)); break; case FSIDSOURCE_UUID: - WRITEMEM(exp->ex_uuid, 16); + p = xdr_encode_opaque_fixed(p, exp->ex_uuid, + EX_UUID_LEN); break; } } if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(0); + *p++ = cpu_to_be32(0); } if (bmval0 & FATTR4_WORD0_LEASE_TIME) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(nn->nfsd4_lease); + *p++ = cpu_to_be32(nn->nfsd4_lease); } if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(rdattr_err); + *p++ = cpu_to_be32(rdattr_err); } if (bmval0 & FATTR4_WORD0_ACL) { struct nfs4_ace *ace; if (acl == NULL) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(0); + *p++ = cpu_to_be32(0); goto out_acl; } - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(acl->naces); + *p++ = cpu_to_be32(acl->naces); for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { - if ((buflen -= 4*3) < 0) + p = xdr_reserve_space(xdr, 4*3); + if (!p) goto out_resource; - WRITE32(ace->type); - WRITE32(ace->flag); - WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); - status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen); + *p++ = cpu_to_be32(ace->type); + *p++ = cpu_to_be32(ace->flag); + *p++ = cpu_to_be32(ace->access_mask & + NFS4_ACE_MASK_ALL); + status = nfsd4_encode_aclname(xdr, rqstp, ace); if (status) goto out; } } out_acl: if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(aclsupport ? + *p++ = cpu_to_be32(aclsupport ? ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); } if (bmval0 & FATTR4_WORD0_CANSETTIME) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(1); + *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(0); + *p++ = cpu_to_be32(0); } if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(1); + *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(1); + *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_FILEHANDLE) { - buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; - if (buflen < 0) + p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); + if (!p) goto out_resource; - WRITE32(fhp->fh_handle.fh_size); - WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); + p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, + fhp->fh_handle.fh_size); } if (bmval0 & FATTR4_WORD0_FILEID) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE64(stat.ino); + p = xdr_encode_hyper(p, stat.ino); } if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE64((u64) statfs.f_ffree); + p = xdr_encode_hyper(p, (u64) statfs.f_ffree); } if (bmval0 & FATTR4_WORD0_FILES_FREE) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE64((u64) statfs.f_ffree); + p = xdr_encode_hyper(p, (u64) statfs.f_ffree); } if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE64((u64) statfs.f_files); + p = xdr_encode_hyper(p, (u64) statfs.f_files); } if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { - status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); + status = nfsd4_encode_fs_locations(xdr, rqstp, exp); if (status) goto out; } if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(1); + *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes); + p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); } if (bmval0 & FATTR4_WORD0_MAXLINK) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(255); + *p++ = cpu_to_be32(255); } if (bmval0 & FATTR4_WORD0_MAXNAME) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(statfs.f_namelen); + *p++ = cpu_to_be32(statfs.f_namelen); } if (bmval0 & FATTR4_WORD0_MAXREAD) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE64((u64) svc_max_payload(rqstp)); + p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); } if (bmval0 & FATTR4_WORD0_MAXWRITE) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE64((u64) svc_max_payload(rqstp)); + p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); } if (bmval1 & FATTR4_WORD1_MODE) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(stat.mode & S_IALLUGO); + *p++ = cpu_to_be32(stat.mode & S_IALLUGO); } if (bmval1 & FATTR4_WORD1_NO_TRUNC) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(1); + *p++ = cpu_to_be32(1); } if (bmval1 & FATTR4_WORD1_NUMLINKS) { - if ((buflen -= 4) < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto out_resource; - WRITE32(stat.nlink); + *p++ = cpu_to_be32(stat.nlink); } if (bmval1 & FATTR4_WORD1_OWNER) { - status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); + status = nfsd4_encode_user(xdr, rqstp, stat.uid); if (status) goto out; } if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { - status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); + status = nfsd4_encode_group(xdr, rqstp, stat.gid); if (status) goto out; } if (bmval1 & FATTR4_WORD1_RAWDEV) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; - WRITE32((u32) MAJOR(stat.rdev)); - WRITE32((u32) MINOR(stat.rdev)); + *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); + *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); } if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; - WRITE64(dummy64); + p = xdr_encode_hyper(p, dummy64); } if (bmval1 & FATTR4_WORD1_SPACE_FREE) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; - WRITE64(dummy64); + p = xdr_encode_hyper(p, dummy64); } if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; - WRITE64(dummy64); + p = xdr_encode_hyper(p, dummy64); } if (bmval1 & FATTR4_WORD1_SPACE_USED) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; dummy64 = (u64)stat.blocks << 9; - WRITE64(dummy64); + p = xdr_encode_hyper(p, dummy64); } if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { - if ((buflen -= 12) < 0) + p = xdr_reserve_space(xdr, 12); + if (!p) goto out_resource; - WRITE64((s64)stat.atime.tv_sec); - WRITE32(stat.atime.tv_nsec); + p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); + *p++ = cpu_to_be32(stat.atime.tv_nsec); } if (bmval1 & FATTR4_WORD1_TIME_DELTA) { - if ((buflen -= 12) < 0) + p = xdr_reserve_space(xdr, 12); + if (!p) goto out_resource; - WRITE32(0); - WRITE32(1); - WRITE32(0); + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(1); + *p++ = cpu_to_be32(0); } if (bmval1 & FATTR4_WORD1_TIME_METADATA) { - if ((buflen -= 12) < 0) + p = xdr_reserve_space(xdr, 12); + if (!p) goto out_resource; - WRITE64((s64)stat.ctime.tv_sec); - WRITE32(stat.ctime.tv_nsec); + p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); + *p++ = cpu_to_be32(stat.ctime.tv_nsec); } if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { - if ((buflen -= 12) < 0) + p = xdr_reserve_space(xdr, 12); + if (!p) goto out_resource; - WRITE64((s64)stat.mtime.tv_sec); - WRITE32(stat.mtime.tv_nsec); + p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); + *p++ = cpu_to_be32(stat.mtime.tv_nsec); } if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { - if ((buflen -= 8) < 0) + p = xdr_reserve_space(xdr, 8); + if (!p) goto out_resource; /* * Get parent's attributes if not ignoring crossmount @@ -2473,25 +2480,26 @@ out_acl: if (ignore_crossmnt == 0 && dentry == exp->ex_path.mnt->mnt_root) get_parent_attributes(exp, &stat); - WRITE64(stat.ino); + p = xdr_encode_hyper(p, stat.ino); } if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { - status = nfsd4_encode_security_label(rqstp, context, - contextlen, &p, &buflen); + status = nfsd4_encode_security_label(xdr, rqstp, context, + contextlen); if (status) goto out; } if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { - if ((buflen -= 16) < 0) + p = xdr_reserve_space(xdr, 16); + if (!p) goto out_resource; - WRITE32(3); - WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); - WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); - WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); + *p++ = cpu_to_be32(3); + *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0); + *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1); + *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2); } - *attrlenp = htonl((char *)p - (char *)attrlenp - 4); - *buffer = p; + attrlen = htonl(xdr->buf->len - attrlen_offset - 4); + write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); status = nfs_ok; out: @@ -2504,6 +2512,8 @@ out: fh_put(tempfh); kfree(tempfh); } + if (status) + xdr_truncate_encode(xdr, starting_len); return status; out_nfserr: status = nfserrno(err); @@ -2513,6 +2523,37 @@ out_resource: goto out; } +static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, + struct xdr_buf *buf, __be32 *p, int bytes) +{ + xdr->scratch.iov_len = 0; + memset(buf, 0, sizeof(struct xdr_buf)); + buf->head[0].iov_base = p; + buf->head[0].iov_len = 0; + buf->len = 0; + xdr->buf = buf; + xdr->iov = buf->head; + xdr->p = p; + xdr->end = (void *)p + bytes; + buf->buflen = bytes; +} + +__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, + struct svc_fh *fhp, struct svc_export *exp, + struct dentry *dentry, u32 *bmval, + struct svc_rqst *rqstp, int ignore_crossmnt) +{ + struct xdr_buf dummy; + struct xdr_stream xdr; + __be32 ret; + + svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); + ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, + ignore_crossmnt); + *p = xdr.p; + return ret; +} + static inline int attributes_need_mount(u32 *bmval) { if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) @@ -2523,8 +2564,8 @@ static inline int attributes_need_mount(u32 *bmval) } static __be32 -nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, - const char *name, int namlen, __be32 **p, int buflen) +nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, + const char *name, int namlen) { struct svc_export *exp = cd->rd_fhp->fh_export; struct dentry *dentry; @@ -2576,7 +2617,7 @@ nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, } out_encode: - nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, + nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, cd->rd_rqstp, ignore_crossmnt); out_put: dput(dentry); @@ -2585,9 +2626,12 @@ out_put: } static __be32 * -nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) +nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) { - if (buflen < 6) + __be32 *p; + + p = xdr_reserve_space(xdr, 6); + if (!p) return NULL; *p++ = htonl(2); *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ @@ -2604,10 +2648,13 @@ nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, { struct readdir_cd *ccd = ccdv; struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); - int buflen; - __be32 *p = cd->buffer; - __be32 *cookiep; + struct xdr_stream *xdr = cd->xdr; + int start_offset = xdr->buf->len; + int cookie_offset; + int entry_bytes; __be32 nfserr = nfserr_toosmall; + __be64 wire_offset; + __be32 *p; /* In nfsv4, "." and ".." never make it onto the wire.. */ if (name && isdotent(name, namlen)) { @@ -2615,19 +2662,24 @@ nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, return 0; } - if (cd->offset) - xdr_encode_hyper(cd->offset, (u64) offset); + if (cd->cookie_offset) { + wire_offset = cpu_to_be64(offset); + write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, + &wire_offset, 8); + } - buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); - if (buflen < 0) + p = xdr_reserve_space(xdr, 4); + if (!p) goto fail; - *p++ = xdr_one; /* mark entry present */ - cookiep = p; + cookie_offset = xdr->buf->len; + p = xdr_reserve_space(xdr, 3*4 + namlen); + if (!p) + goto fail; p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ p = xdr_encode_array(p, name, namlen); /* name length & name */ - nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen); + nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); switch (nfserr) { case nfs_ok: break; @@ -2646,59 +2698,74 @@ nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, */ if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) goto fail; - p = nfsd4_encode_rdattr_error(p, buflen, nfserr); + p = nfsd4_encode_rdattr_error(xdr, nfserr); if (p == NULL) { nfserr = nfserr_toosmall; goto fail; } } - cd->buflen -= (p - cd->buffer); - cd->buffer = p; - cd->offset = cookiep; + nfserr = nfserr_toosmall; + entry_bytes = xdr->buf->len - start_offset; + if (entry_bytes > cd->rd_maxcount) + goto fail; + cd->rd_maxcount -= entry_bytes; + if (!cd->rd_dircount) + goto fail; + cd->rd_dircount--; + cd->cookie_offset = cookie_offset; skip_entry: cd->common.err = nfs_ok; return 0; fail: + xdr_truncate_encode(xdr, start_offset); cd->common.err = nfserr; return -EINVAL; } -static void -nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) +static __be32 +nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) { __be32 *p; - RESERVE_SPACE(sizeof(stateid_t)); - WRITE32(sid->si_generation); - WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, sizeof(stateid_t)); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(sid->si_generation); + p = xdr_encode_opaque_fixed(p, &sid->si_opaque, + sizeof(stateid_opaque_t)); + return 0; } static __be32 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { - RESERVE_SPACE(8); - WRITE32(access->ac_supported); - WRITE32(access->ac_resp_access); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 8); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(access->ac_supported); + *p++ = cpu_to_be32(access->ac_resp_access); } return nfserr; } static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { - RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8); - WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); - WRITE32(bcts->dir); + p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); + if (!p) + return nfserr_resource; + p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, + NFS4_MAX_SESSIONID_LEN); + *p++ = cpu_to_be32(bcts->dir); /* Sorry, we do not yet support RDMA over 4.1: */ - WRITE32(0); - ADJUST_ARGS(); + *p++ = cpu_to_be32(0); } return nfserr; } @@ -2706,8 +2773,10 @@ static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, static __be32 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) { + struct xdr_stream *xdr = &resp->xdr; + if (!nfserr) - nfsd4_encode_stateid(resp, &close->cl_stateid); + nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); return nfserr; } @@ -2716,12 +2785,15 @@ nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_c static __be32 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { - RESERVE_SPACE(NFS4_VERIFIER_SIZE); - WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); + if (!p) + return nfserr_resource; + p = xdr_encode_opaque_fixed(p, commit->co_verf.data, + NFS4_VERIFIER_SIZE); } return nfserr; } @@ -2729,15 +2801,17 @@ nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_ static __be32 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { - RESERVE_SPACE(32); - write_cinfo(&p, &create->cr_cinfo); - WRITE32(2); - WRITE32(create->cr_bmval[0]); - WRITE32(create->cr_bmval[1]); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 32); + if (!p) + return nfserr_resource; + p = encode_cinfo(p, &create->cr_cinfo); + *p++ = cpu_to_be32(2); + *p++ = cpu_to_be32(create->cr_bmval[0]); + *p++ = cpu_to_be32(create->cr_bmval[1]); } return nfserr; } @@ -2746,14 +2820,13 @@ static __be32 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) { struct svc_fh *fhp = getattr->ga_fhp; - int buflen; + struct xdr_stream *xdr = &resp->xdr; if (nfserr) return nfserr; - buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); - nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, - &resp->p, buflen, getattr->ga_bmval, + nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, + getattr->ga_bmval, resp->rqstp, 0); return nfserr; } @@ -2761,16 +2834,17 @@ nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4 static __be32 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) { + struct xdr_stream *xdr = &resp->xdr; struct svc_fh *fhp = *fhpp; unsigned int len; __be32 *p; if (!nfserr) { len = fhp->fh_handle.fh_size; - RESERVE_SPACE(len + 4); - WRITE32(len); - WRITEMEM(&fhp->fh_handle.fh_base, len); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, len + 4); + if (!p) + return nfserr_resource; + p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); } return nfserr; } @@ -2779,52 +2853,69 @@ nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh * Including all fields other than the name, a LOCK4denied structure requires * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. */ -static void -nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) +static __be32 +nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) { struct xdr_netobj *conf = &ld->ld_owner; __be32 *p; - RESERVE_SPACE(32 + XDR_LEN(conf->len)); - WRITE64(ld->ld_start); - WRITE64(ld->ld_length); - WRITE32(ld->ld_type); +again: + p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); + if (!p) { + /* + * Don't fail to return the result just because we can't + * return the conflicting open: + */ + if (conf->len) { + conf->len = 0; + conf->data = NULL; + goto again; + } + return nfserr_resource; + } + p = xdr_encode_hyper(p, ld->ld_start); + p = xdr_encode_hyper(p, ld->ld_length); + *p++ = cpu_to_be32(ld->ld_type); if (conf->len) { - WRITEMEM(&ld->ld_clientid, 8); - WRITE32(conf->len); - WRITEMEM(conf->data, conf->len); - kfree(conf->data); + p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); + p = xdr_encode_opaque(p, conf->data, conf->len); } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ - WRITE64((u64)0); /* clientid */ - WRITE32(0); /* length of owner name */ + p = xdr_encode_hyper(p, (u64)0); /* clientid */ + *p++ = cpu_to_be32(0); /* length of owner name */ } - ADJUST_ARGS(); + return nfserr_denied; } static __be32 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) { + struct xdr_stream *xdr = &resp->xdr; + if (!nfserr) - nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); + nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); else if (nfserr == nfserr_denied) - nfsd4_encode_lock_denied(resp, &lock->lk_denied); - + nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); + kfree(lock->lk_denied.ld_owner.data); return nfserr; } static __be32 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) { + struct xdr_stream *xdr = &resp->xdr; + if (nfserr == nfserr_denied) - nfsd4_encode_lock_denied(resp, &lockt->lt_denied); + nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); return nfserr; } static __be32 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) { + struct xdr_stream *xdr = &resp->xdr; + if (!nfserr) - nfsd4_encode_stateid(resp, &locku->lu_stateid); + nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); return nfserr; } @@ -2833,12 +2924,14 @@ nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_l static __be32 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { - RESERVE_SPACE(20); - write_cinfo(&p, &link->li_cinfo); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 20); + if (!p) + return nfserr_resource; + p = encode_cinfo(p, &link->li_cinfo); } return nfserr; } @@ -2847,72 +2940,86 @@ nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_li static __be32 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (nfserr) goto out; - nfsd4_encode_stateid(resp, &open->op_stateid); - RESERVE_SPACE(40); - write_cinfo(&p, &open->op_cinfo); - WRITE32(open->op_rflags); - WRITE32(2); - WRITE32(open->op_bmval[0]); - WRITE32(open->op_bmval[1]); - WRITE32(open->op_delegate_type); - ADJUST_ARGS(); + nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); + if (nfserr) + goto out; + p = xdr_reserve_space(xdr, 40); + if (!p) + return nfserr_resource; + p = encode_cinfo(p, &open->op_cinfo); + *p++ = cpu_to_be32(open->op_rflags); + *p++ = cpu_to_be32(2); + *p++ = cpu_to_be32(open->op_bmval[0]); + *p++ = cpu_to_be32(open->op_bmval[1]); + *p++ = cpu_to_be32(open->op_delegate_type); switch (open->op_delegate_type) { case NFS4_OPEN_DELEGATE_NONE: break; case NFS4_OPEN_DELEGATE_READ: - nfsd4_encode_stateid(resp, &open->op_delegate_stateid); - RESERVE_SPACE(20); - WRITE32(open->op_recall); + nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); + if (nfserr) + return nfserr; + p = xdr_reserve_space(xdr, 20); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(open->op_recall); /* * TODO: ACE's in delegations */ - WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); - WRITE32(0); - WRITE32(0); - WRITE32(0); /* XXX: is NULL principal ok? */ - ADJUST_ARGS(); + *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ break; case NFS4_OPEN_DELEGATE_WRITE: - nfsd4_encode_stateid(resp, &open->op_delegate_stateid); - RESERVE_SPACE(32); - WRITE32(0); + nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); + if (nfserr) + return nfserr; + p = xdr_reserve_space(xdr, 32); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(0); /* * TODO: space_limit's in delegations */ - WRITE32(NFS4_LIMIT_SIZE); - WRITE32(~(u32)0); - WRITE32(~(u32)0); + *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); + *p++ = cpu_to_be32(~(u32)0); + *p++ = cpu_to_be32(~(u32)0); /* * TODO: ACE's in delegations */ - WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); - WRITE32(0); - WRITE32(0); - WRITE32(0); /* XXX: is NULL principal ok? */ - ADJUST_ARGS(); + *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ break; case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ switch (open->op_why_no_deleg) { case WND4_CONTENTION: case WND4_RESOURCE: - RESERVE_SPACE(8); - WRITE32(open->op_why_no_deleg); - WRITE32(0); /* deleg signaling not supported yet */ + p = xdr_reserve_space(xdr, 8); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(open->op_why_no_deleg); + /* deleg signaling not supported yet: */ + *p++ = cpu_to_be32(0); break; default: - RESERVE_SPACE(4); - WRITE32(open->op_why_no_deleg); + p = xdr_reserve_space(xdr, 4); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(open->op_why_no_deleg); } - ADJUST_ARGS(); break; default: BUG(); @@ -2925,8 +3032,10 @@ out: static __be32 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) { + struct xdr_stream *xdr = &resp->xdr; + if (!nfserr) - nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); + nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); return nfserr; } @@ -2934,127 +3043,233 @@ nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct static __be32 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) { + struct xdr_stream *xdr = &resp->xdr; + if (!nfserr) - nfsd4_encode_stateid(resp, &od->od_stateid); + nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); return nfserr; } -static __be32 -nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, - struct nfsd4_read *read) +static __be32 nfsd4_encode_splice_read( + struct nfsd4_compoundres *resp, + struct nfsd4_read *read, + struct file *file, unsigned long maxcount) { + struct xdr_stream *xdr = &resp->xdr; + struct xdr_buf *buf = xdr->buf; u32 eof; - int v; - struct page *page; - unsigned long maxcount; - long len; - __be32 *p; + int space_left; + __be32 nfserr; + __be32 *p = xdr->p - 2; - if (nfserr) - return nfserr; - if (resp->xbuf->page_len) + /* + * Don't inline pages unless we know there's room for eof, + * count, and possible padding: + */ + if (xdr->end - xdr->p < 3) return nfserr_resource; - RESERVE_SPACE(8); /* eof flag and byte count */ + nfserr = nfsd_splice_read(read->rd_rqstp, file, + read->rd_offset, &maxcount); + if (nfserr) { + /* + * nfsd_splice_actor may have already messed with the + * page length; reset it so as not to confuse + * xdr_truncate_encode: + */ + buf->page_len = 0; + return nfserr; + } - maxcount = svc_max_payload(resp->rqstp); - if (maxcount > read->rd_length) - maxcount = read->rd_length; + eof = (read->rd_offset + maxcount >= + read->rd_fhp->fh_dentry->d_inode->i_size); + + *(p++) = htonl(eof); + *(p++) = htonl(maxcount); + + buf->page_len = maxcount; + buf->len += maxcount; + xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE; + + /* Use rest of head for padding and remaining ops: */ + buf->tail[0].iov_base = xdr->p; + buf->tail[0].iov_len = 0; + xdr->iov = buf->tail; + if (maxcount&3) { + int pad = 4 - (maxcount&3); + + *(xdr->p++) = 0; + + buf->tail[0].iov_base += maxcount&3; + buf->tail[0].iov_len = pad; + buf->len += pad; + } + + space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, + buf->buflen - buf->len); + buf->buflen = buf->len + space_left; + xdr->end = (__be32 *)((void *)xdr->end + space_left); + + return 0; +} + +static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, + struct nfsd4_read *read, + struct file *file, unsigned long maxcount) +{ + struct xdr_stream *xdr = &resp->xdr; + u32 eof; + int v; + int starting_len = xdr->buf->len - 8; + long len; + int thislen; + __be32 nfserr; + __be32 tmp; + __be32 *p; + u32 zzz = 0; + int pad; len = maxcount; v = 0; - while (len > 0) { - page = *(resp->rqstp->rq_next_page); - if (!page) { /* ran out of pages */ - maxcount -= len; - break; - } - resp->rqstp->rq_vec[v].iov_base = page_address(page); - resp->rqstp->rq_vec[v].iov_len = - len < PAGE_SIZE ? len : PAGE_SIZE; - resp->rqstp->rq_next_page++; + + thislen = (void *)xdr->end - (void *)xdr->p; + if (len < thislen) + thislen = len; + p = xdr_reserve_space(xdr, (thislen+3)&~3); + WARN_ON_ONCE(!p); + resp->rqstp->rq_vec[v].iov_base = p; + resp->rqstp->rq_vec[v].iov_len = thislen; + v++; + len -= thislen; + + while (len) { + thislen = min_t(long, len, PAGE_SIZE); + p = xdr_reserve_space(xdr, (thislen+3)&~3); + WARN_ON_ONCE(!p); + resp->rqstp->rq_vec[v].iov_base = p; + resp->rqstp->rq_vec[v].iov_len = thislen; v++; - len -= PAGE_SIZE; + len -= thislen; } read->rd_vlen = v; - nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp, - read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, - &maxcount); - + nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, + read->rd_vlen, &maxcount); if (nfserr) return nfserr; + xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); + eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size); - WRITE32(eof); - WRITE32(maxcount); - ADJUST_ARGS(); - resp->xbuf->head[0].iov_len = (char*)p - - (char*)resp->xbuf->head[0].iov_base; - resp->xbuf->page_len = maxcount; + tmp = htonl(eof); + write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); + tmp = htonl(maxcount); + write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); - /* Use rest of head for padding and remaining ops: */ - resp->xbuf->tail[0].iov_base = p; - resp->xbuf->tail[0].iov_len = 0; - if (maxcount&3) { - RESERVE_SPACE(4); - WRITE32(0); - resp->xbuf->tail[0].iov_base += maxcount&3; - resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); - ADJUST_ARGS(); - } + pad = (maxcount&3) ? 4 - (maxcount&3) : 0; + write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, + &zzz, pad); return 0; + } static __be32 -nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) +nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, + struct nfsd4_read *read) { - int maxcount; - char *page; + unsigned long maxcount; + struct xdr_stream *xdr = &resp->xdr; + struct file *file = read->rd_filp; + int starting_len = xdr->buf->len; + struct raparms *ra; __be32 *p; + __be32 err; if (nfserr) return nfserr; - if (resp->xbuf->page_len) + + p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ + if (!p) { + WARN_ON_ONCE(resp->rqstp->rq_splice_ok); return nfserr_resource; - if (!*resp->rqstp->rq_next_page) + } + if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) { + WARN_ON_ONCE(1); return nfserr_resource; + } + xdr_commit_encode(xdr); + + maxcount = svc_max_payload(resp->rqstp); + if (maxcount > xdr->buf->buflen - xdr->buf->len) + maxcount = xdr->buf->buflen - xdr->buf->len; + if (maxcount > read->rd_length) + maxcount = read->rd_length; + + if (!read->rd_filp) { + err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp, + &file, &ra); + if (err) + goto err_truncate; + } + + if (file->f_op->splice_read && resp->rqstp->rq_splice_ok) + err = nfsd4_encode_splice_read(resp, read, file, maxcount); + else + err = nfsd4_encode_readv(resp, read, file, maxcount); + + if (!read->rd_filp) + nfsd_put_tmp_read_open(file, ra); + +err_truncate: + if (err) + xdr_truncate_encode(xdr, starting_len); + return err; +} + +static __be32 +nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) +{ + int maxcount; + __be32 wire_count; + int zero = 0; + struct xdr_stream *xdr = &resp->xdr; + int length_offset = xdr->buf->len; + __be32 *p; - page = page_address(*(resp->rqstp->rq_next_page++)); + if (nfserr) + return nfserr; + p = xdr_reserve_space(xdr, 4); + if (!p) + return nfserr_resource; maxcount = PAGE_SIZE; - RESERVE_SPACE(4); + p = xdr_reserve_space(xdr, maxcount); + if (!p) + return nfserr_resource; /* * XXX: By default, the ->readlink() VFS op will truncate symlinks * if they would overflow the buffer. Is this kosher in NFSv4? If * not, one easy fix is: if ->readlink() precisely fills the buffer, * assume that truncation occurred, and return NFS4ERR_RESOURCE. */ - nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); + nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, + (char *)p, &maxcount); if (nfserr == nfserr_isdir) - return nfserr_inval; - if (nfserr) + nfserr = nfserr_inval; + if (nfserr) { + xdr_truncate_encode(xdr, length_offset); return nfserr; - - WRITE32(maxcount); - ADJUST_ARGS(); - resp->xbuf->head[0].iov_len = (char*)p - - (char*)resp->xbuf->head[0].iov_base; - resp->xbuf->page_len = maxcount; - - /* Use rest of head for padding and remaining ops: */ - resp->xbuf->tail[0].iov_base = p; - resp->xbuf->tail[0].iov_len = 0; - if (maxcount&3) { - RESERVE_SPACE(4); - WRITE32(0); - resp->xbuf->tail[0].iov_base += maxcount&3; - resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); - ADJUST_ARGS(); } + + wire_count = htonl(maxcount); + write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); + xdr_truncate_encode(xdr, length_offset + 4 + maxcount); + if (maxcount & 3) + write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, + &zero, 4 - (maxcount&3)); return 0; } @@ -3062,47 +3277,52 @@ static __be32 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) { int maxcount; + int bytes_left; loff_t offset; - __be32 *page, *savep, *tailbase; + __be64 wire_offset; + struct xdr_stream *xdr = &resp->xdr; + int starting_len = xdr->buf->len; __be32 *p; if (nfserr) return nfserr; - if (resp->xbuf->page_len) - return nfserr_resource; - if (!*resp->rqstp->rq_next_page) - return nfserr_resource; - RESERVE_SPACE(NFS4_VERIFIER_SIZE); - savep = p; + p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); + if (!p) + return nfserr_resource; /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ - WRITE32(0); - WRITE32(0); - ADJUST_ARGS(); - resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; - tailbase = p; - - maxcount = PAGE_SIZE; - if (maxcount > readdir->rd_maxcount) - maxcount = readdir->rd_maxcount; + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(0); + resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) + - (char *)resp->xdr.buf->head[0].iov_base; /* - * Convert from bytes to words, account for the two words already - * written, make sure to leave two words at the end for the next - * pointer and eof field. + * Number of bytes left for directory entries allowing for the + * final 8 bytes of the readdir and a following failed op: + */ + bytes_left = xdr->buf->buflen - xdr->buf->len + - COMPOUND_ERR_SLACK_SPACE - 8; + if (bytes_left < 0) { + nfserr = nfserr_resource; + goto err_no_verf; + } + maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); + /* + * Note the rfc defines rd_maxcount as the size of the + * READDIR4resok structure, which includes the verifier above + * and the 8 bytes encoded at the end of this function: */ - maxcount = (maxcount >> 2) - 4; - if (maxcount < 0) { - nfserr = nfserr_toosmall; + if (maxcount < 16) { + nfserr = nfserr_toosmall; goto err_no_verf; } + maxcount = min_t(int, maxcount-16, bytes_left); - page = page_address(*(resp->rqstp->rq_next_page++)); + readdir->xdr = xdr; + readdir->rd_maxcount = maxcount; readdir->common.err = 0; - readdir->buflen = maxcount; - readdir->buffer = page; - readdir->offset = NULL; + readdir->cookie_offset = 0; offset = readdir->rd_cookie; nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, @@ -3110,42 +3330,49 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4 &readdir->common, nfsd4_encode_dirent); if (nfserr == nfs_ok && readdir->common.err == nfserr_toosmall && - readdir->buffer == page) - nfserr = nfserr_toosmall; + xdr->buf->len == starting_len + 8) { + /* nothing encoded; which limit did we hit?: */ + if (maxcount - 16 < bytes_left) + /* It was the fault of rd_maxcount: */ + nfserr = nfserr_toosmall; + else + /* We ran out of buffer space: */ + nfserr = nfserr_resource; + } if (nfserr) goto err_no_verf; - if (readdir->offset) - xdr_encode_hyper(readdir->offset, offset); + if (readdir->cookie_offset) { + wire_offset = cpu_to_be64(offset); + write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, + &wire_offset, 8); + } - p = readdir->buffer; + p = xdr_reserve_space(xdr, 8); + if (!p) { + WARN_ON_ONCE(1); + goto err_no_verf; + } *p++ = 0; /* no more entries */ *p++ = htonl(readdir->common.err == nfserr_eof); - resp->xbuf->page_len = ((char*)p) - - (char*)page_address(*(resp->rqstp->rq_next_page-1)); - - /* Use rest of head for padding and remaining ops: */ - resp->xbuf->tail[0].iov_base = tailbase; - resp->xbuf->tail[0].iov_len = 0; - resp->p = resp->xbuf->tail[0].iov_base; - resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; return 0; err_no_verf: - p = savep; - ADJUST_ARGS(); + xdr_truncate_encode(xdr, starting_len); return nfserr; } static __be32 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { - RESERVE_SPACE(20); - write_cinfo(&p, &remove->rm_cinfo); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 20); + if (!p) + return nfserr_resource; + p = encode_cinfo(p, &remove->rm_cinfo); } return nfserr; } @@ -3153,19 +3380,21 @@ nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_ static __be32 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { - RESERVE_SPACE(40); - write_cinfo(&p, &rename->rn_sinfo); - write_cinfo(&p, &rename->rn_tinfo); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 40); + if (!p) + return nfserr_resource; + p = encode_cinfo(p, &rename->rn_sinfo); + p = encode_cinfo(p, &rename->rn_tinfo); } return nfserr; } static __be32 -nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, +nfsd4_do_encode_secinfo(struct xdr_stream *xdr, __be32 nfserr, struct svc_export *exp) { u32 i, nflavs, supported; @@ -3176,6 +3405,7 @@ nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, if (nfserr) goto out; + nfserr = nfserr_resource; if (exp->ex_nflavors) { flavs = exp->ex_flavors; nflavs = exp->ex_nflavors; @@ -3197,9 +3427,10 @@ nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, } supported = 0; - RESERVE_SPACE(4); + p = xdr_reserve_space(xdr, 4); + if (!p) + goto out; flavorsp = p++; /* to be backfilled later */ - ADJUST_ARGS(); for (i = 0; i < nflavs; i++) { rpc_authflavor_t pf = flavs[i].pseudoflavor; @@ -3207,18 +3438,20 @@ nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, if (rpcauth_get_gssinfo(pf, &info) == 0) { supported++; - RESERVE_SPACE(4 + 4 + XDR_LEN(info.oid.len) + 4 + 4); - WRITE32(RPC_AUTH_GSS); - WRITE32(info.oid.len); - WRITEMEM(info.oid.data, info.oid.len); - WRITE32(info.qop); - WRITE32(info.service); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 4 + 4 + + XDR_LEN(info.oid.len) + 4 + 4); + if (!p) + goto out; + *p++ = cpu_to_be32(RPC_AUTH_GSS); + p = xdr_encode_opaque(p, info.oid.data, info.oid.len); + *p++ = cpu_to_be32(info.qop); + *p++ = cpu_to_be32(info.service); } else if (pf < RPC_AUTH_MAXFLAVOR) { supported++; - RESERVE_SPACE(4); - WRITE32(pf); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 4); + if (!p) + goto out; + *p++ = cpu_to_be32(pf); } else { if (report) pr_warn("NFS: SECINFO: security flavor %u " @@ -3229,7 +3462,7 @@ nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, if (nflavs != supported) report = false; *flavorsp = htonl(supported); - + nfserr = 0; out: if (exp) exp_put(exp); @@ -3240,14 +3473,18 @@ static __be32 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_secinfo *secinfo) { - return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp); + struct xdr_stream *xdr = &resp->xdr; + + return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); } static __be32 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_secinfo_no_name *secinfo) { - return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp); + struct xdr_stream *xdr = &resp->xdr; + + return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); } /* @@ -3257,41 +3494,47 @@ nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, static __be32 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; - RESERVE_SPACE(16); + p = xdr_reserve_space(xdr, 16); + if (!p) + return nfserr_resource; if (nfserr) { - WRITE32(3); - WRITE32(0); - WRITE32(0); - WRITE32(0); + *p++ = cpu_to_be32(3); + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(0); } else { - WRITE32(3); - WRITE32(setattr->sa_bmval[0]); - WRITE32(setattr->sa_bmval[1]); - WRITE32(setattr->sa_bmval[2]); + *p++ = cpu_to_be32(3); + *p++ = cpu_to_be32(setattr->sa_bmval[0]); + *p++ = cpu_to_be32(setattr->sa_bmval[1]); + *p++ = cpu_to_be32(setattr->sa_bmval[2]); } - ADJUST_ARGS(); return nfserr; } static __be32 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { - RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE); - WRITEMEM(&scd->se_clientid, 8); - WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); + if (!p) + return nfserr_resource; + p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); + p = xdr_encode_opaque_fixed(p, &scd->se_confirm, + NFS4_VERIFIER_SIZE); } else if (nfserr == nfserr_clid_inuse) { - RESERVE_SPACE(8); - WRITE32(0); - WRITE32(0); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 8); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(0); + *p++ = cpu_to_be32(0); } return nfserr; } @@ -3299,14 +3542,17 @@ nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct n static __be32 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { - RESERVE_SPACE(16); - WRITE32(write->wr_bytes_written); - WRITE32(write->wr_how_written); - WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 16); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(write->wr_bytes_written); + *p++ = cpu_to_be32(write->wr_how_written); + p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, + NFS4_VERIFIER_SIZE); } return nfserr; } @@ -3323,6 +3569,7 @@ static __be32 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_exchange_id *exid) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; char *major_id; char *server_scope; @@ -3338,60 +3585,61 @@ nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, server_scope = utsname()->nodename; server_scope_sz = strlen(server_scope); - RESERVE_SPACE( + p = xdr_reserve_space(xdr, 8 /* eir_clientid */ + 4 /* eir_sequenceid */ + 4 /* eir_flags */ + 4 /* spr_how */); + if (!p) + return nfserr_resource; - WRITEMEM(&exid->clientid, 8); - WRITE32(exid->seqid); - WRITE32(exid->flags); + p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); + *p++ = cpu_to_be32(exid->seqid); + *p++ = cpu_to_be32(exid->flags); - WRITE32(exid->spa_how); - ADJUST_ARGS(); + *p++ = cpu_to_be32(exid->spa_how); switch (exid->spa_how) { case SP4_NONE: break; case SP4_MACH_CRED: /* spo_must_enforce, spo_must_allow */ - RESERVE_SPACE(16); + p = xdr_reserve_space(xdr, 16); + if (!p) + return nfserr_resource; /* spo_must_enforce bitmap: */ - WRITE32(2); - WRITE32(nfs4_minimal_spo_must_enforce[0]); - WRITE32(nfs4_minimal_spo_must_enforce[1]); + *p++ = cpu_to_be32(2); + *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]); + *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]); /* empty spo_must_allow bitmap: */ - WRITE32(0); + *p++ = cpu_to_be32(0); - ADJUST_ARGS(); break; default: WARN_ON_ONCE(1); } - RESERVE_SPACE( + p = xdr_reserve_space(xdr, 8 /* so_minor_id */ + 4 /* so_major_id.len */ + (XDR_QUADLEN(major_id_sz) * 4) + 4 /* eir_server_scope.len */ + (XDR_QUADLEN(server_scope_sz) * 4) + 4 /* eir_server_impl_id.count (0) */); + if (!p) + return nfserr_resource; /* The server_owner struct */ - WRITE64(minor_id); /* Minor id */ + p = xdr_encode_hyper(p, minor_id); /* Minor id */ /* major id */ - WRITE32(major_id_sz); - WRITEMEM(major_id, major_id_sz); + p = xdr_encode_opaque(p, major_id, major_id_sz); /* Server scope */ - WRITE32(server_scope_sz); - WRITEMEM(server_scope, server_scope_sz); + p = xdr_encode_opaque(p, server_scope, server_scope_sz); /* Implementation id */ - WRITE32(0); /* zero length nfs_impl_id4 array */ - ADJUST_ARGS(); + *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ return 0; } @@ -3399,47 +3647,54 @@ static __be32 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create_session *sess) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (nfserr) return nfserr; - RESERVE_SPACE(24); - WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); - WRITE32(sess->seqid); - WRITE32(sess->flags); - ADJUST_ARGS(); - - RESERVE_SPACE(28); - WRITE32(0); /* headerpadsz */ - WRITE32(sess->fore_channel.maxreq_sz); - WRITE32(sess->fore_channel.maxresp_sz); - WRITE32(sess->fore_channel.maxresp_cached); - WRITE32(sess->fore_channel.maxops); - WRITE32(sess->fore_channel.maxreqs); - WRITE32(sess->fore_channel.nr_rdma_attrs); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 24); + if (!p) + return nfserr_resource; + p = xdr_encode_opaque_fixed(p, sess->sessionid.data, + NFS4_MAX_SESSIONID_LEN); + *p++ = cpu_to_be32(sess->seqid); + *p++ = cpu_to_be32(sess->flags); + + p = xdr_reserve_space(xdr, 28); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(0); /* headerpadsz */ + *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); + *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); + *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); + *p++ = cpu_to_be32(sess->fore_channel.maxops); + *p++ = cpu_to_be32(sess->fore_channel.maxreqs); + *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); if (sess->fore_channel.nr_rdma_attrs) { - RESERVE_SPACE(4); - WRITE32(sess->fore_channel.rdma_attrs); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 4); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); } - RESERVE_SPACE(28); - WRITE32(0); /* headerpadsz */ - WRITE32(sess->back_channel.maxreq_sz); - WRITE32(sess->back_channel.maxresp_sz); - WRITE32(sess->back_channel.maxresp_cached); - WRITE32(sess->back_channel.maxops); - WRITE32(sess->back_channel.maxreqs); - WRITE32(sess->back_channel.nr_rdma_attrs); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 28); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(0); /* headerpadsz */ + *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); + *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); + *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); + *p++ = cpu_to_be32(sess->back_channel.maxops); + *p++ = cpu_to_be32(sess->back_channel.maxreqs); + *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); if (sess->back_channel.nr_rdma_attrs) { - RESERVE_SPACE(4); - WRITE32(sess->back_channel.rdma_attrs); - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 4); + if (!p) + return nfserr_resource; + *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); } return 0; } @@ -3448,22 +3703,25 @@ static __be32 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_sequence *seq) { + struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (nfserr) return nfserr; - RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); - WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); - WRITE32(seq->seqid); - WRITE32(seq->slotid); + p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); + if (!p) + return nfserr_resource; + p = xdr_encode_opaque_fixed(p, seq->sessionid.data, + NFS4_MAX_SESSIONID_LEN); + *p++ = cpu_to_be32(seq->seqid); + *p++ = cpu_to_be32(seq->slotid); /* Note slotid's are numbered from zero: */ - WRITE32(seq->maxslots - 1); /* sr_highest_slotid */ - WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */ - WRITE32(seq->status_flags); + *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ + *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ + *p++ = cpu_to_be32(seq->status_flags); - ADJUST_ARGS(); - resp->cstate.datap = p; /* DRC cache data pointer */ + resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ return 0; } @@ -3471,20 +3729,22 @@ static __be32 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_test_stateid *test_stateid) { + struct xdr_stream *xdr = &resp->xdr; struct nfsd4_test_stateid_id *stateid, *next; __be32 *p; if (nfserr) return nfserr; - RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids)); + p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); + if (!p) + return nfserr_resource; *p++ = htonl(test_stateid->ts_num_ids); list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { *p++ = stateid->ts_id_status; } - ADJUST_ARGS(); return nfserr; } @@ -3563,81 +3823,99 @@ static nfsd4_enc nfsd4_enc_ops[] = { }; /* - * Calculate the total amount of memory that the compound response has taken - * after encoding the current operation with pad. - * - * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop() - * which was specified at nfsd4_operation, else pad is zero. - * - * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached. + * Calculate whether we still have space to encode repsize bytes. + * There are two considerations: + * - For NFS versions >=4.1, the size of the reply must stay within + * session limits + * - For all NFS versions, we must stay within limited preallocated + * buffer space. * - * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so - * will be at least a page and will therefore hold the xdr_buf head. + * This is called before the operation is processed, so can only provide + * an upper estimate. For some nonidempotent operations (such as + * getattr), it's not necessarily a problem if that estimate is wrong, + * as we can fail it after processing without significant side effects. */ -__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad) +__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) { - struct xdr_buf *xb = &resp->rqstp->rq_res; - struct nfsd4_session *session = NULL; + struct xdr_buf *buf = &resp->rqstp->rq_res; struct nfsd4_slot *slot = resp->cstate.slot; - u32 length, tlen = 0; + if (buf->len + respsize <= buf->buflen) + return nfs_ok; if (!nfsd4_has_session(&resp->cstate)) - return 0; - - session = resp->cstate.session; - - if (xb->page_len == 0) { - length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; - } else { - if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) - tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; - - length = xb->head[0].iov_len + xb->page_len + tlen + pad; - } - dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, - length, xb->page_len, tlen, pad); - - if (length > session->se_fchannel.maxresp_sz) - return nfserr_rep_too_big; - - if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) && - length > session->se_fchannel.maxresp_cached) + return nfserr_resource; + if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { + WARN_ON_ONCE(1); return nfserr_rep_too_big_to_cache; - - return 0; + } + return nfserr_rep_too_big; } void nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) { + struct xdr_stream *xdr = &resp->xdr; struct nfs4_stateowner *so = resp->cstate.replay_owner; - __be32 *statp; + struct svc_rqst *rqstp = resp->rqstp; + int post_err_offset; + nfsd4_enc encoder; __be32 *p; - RESERVE_SPACE(8); - WRITE32(op->opnum); - statp = p++; /* to be backfilled at the end */ - ADJUST_ARGS(); + p = xdr_reserve_space(xdr, 8); + if (!p) { + WARN_ON_ONCE(1); + return; + } + *p++ = cpu_to_be32(op->opnum); + post_err_offset = xdr->buf->len; if (op->opnum == OP_ILLEGAL) goto status; BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || !nfsd4_enc_ops[op->opnum]); - op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); + encoder = nfsd4_enc_ops[op->opnum]; + op->status = encoder(resp, op->status, &op->u); + xdr_commit_encode(xdr); + /* nfsd4_check_resp_size guarantees enough room for error status */ - if (!op->status) - op->status = nfsd4_check_resp_size(resp, 0); + if (!op->status) { + int space_needed = 0; + if (!nfsd4_last_compound_op(rqstp)) + space_needed = COMPOUND_ERR_SLACK_SPACE; + op->status = nfsd4_check_resp_size(resp, space_needed); + } + if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { + struct nfsd4_slot *slot = resp->cstate.slot; + + if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) + op->status = nfserr_rep_too_big_to_cache; + else + op->status = nfserr_rep_too_big; + } + if (op->status == nfserr_resource || + op->status == nfserr_rep_too_big || + op->status == nfserr_rep_too_big_to_cache) { + /* + * The operation may have already been encoded or + * partially encoded. No op returns anything additional + * in the case of one of these three errors, so we can + * just truncate back to after the status. But it's a + * bug if we had to do this on a non-idempotent op: + */ + warn_on_nonidempotent_op(op); + xdr_truncate_encode(xdr, post_err_offset); + } if (so) { + int len = xdr->buf->len - post_err_offset; + so->so_replay.rp_status = op->status; - so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1); - memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen); + so->so_replay.rp_buflen = len; + read_bytes_from_xdr_buf(xdr->buf, post_err_offset, + so->so_replay.rp_buf, len); } status: - /* - * Note: We write the status directly, instead of using WRITE32(), - * since it is already in network byte order. - */ - *statp = op->status; + /* Note that op->status is already in network byte order: */ + write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); } /* @@ -3649,21 +3927,22 @@ status: * called with nfs4_lock_state() held */ void -nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) +nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) { __be32 *p; struct nfs4_replay *rp = op->replay; BUG_ON(!rp); - RESERVE_SPACE(8); - WRITE32(op->opnum); + p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); + if (!p) { + WARN_ON_ONCE(1); + return; + } + *p++ = cpu_to_be32(op->opnum); *p++ = rp->rp_status; /* already xdr'ed */ - ADJUST_ARGS(); - RESERVE_SPACE(rp->rp_buflen); - WRITEMEM(rp->rp_buf, rp->rp_buflen); - ADJUST_ARGS(); + p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); } int @@ -3720,19 +3999,19 @@ nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compo * All that remains is to write the tag and operation count... */ struct nfsd4_compound_state *cs = &resp->cstate; - struct kvec *iov; + struct xdr_buf *buf = resp->xdr.buf; + + WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + + buf->tail[0].iov_len); + + rqstp->rq_next_page = resp->xdr.page_ptr + 1; + p = resp->tagp; *p++ = htonl(resp->taglen); memcpy(p, resp->tag, resp->taglen); p += XDR_QUADLEN(resp->taglen); *p++ = htonl(resp->opcnt); - if (rqstp->rq_res.page_len) - iov = &rqstp->rq_res.tail[0]; - else - iov = &rqstp->rq_res.head[0]; - iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; - BUG_ON(iov->iov_len > PAGE_SIZE); if (nfsd4_has_session(cs)) { struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); struct nfs4_client *clp = cs->session->se_client; |