/* * Server-side XDR for NFSv4 * * Copyright (c) 2002 The Regents of the University of Michigan. * All rights reserved. * * Kendrick Smith * Andy Adamson * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * TODO: Neil Brown made the following observation: We currently * initially reserve NFSD_BUFSIZE space on the transmit queue and * never release any of that until the request is complete. * It would be good to calculate a new maximum response size while * decoding the COMPOUND, and call svc_reserve with this number * at the end of nfs4svc_decode_compoundargs. */ #include #include #include #include #include #include #include "idmap.h" #include "acl.h" #include "xdr4.h" #include "vfs.h" #include "state.h" #include "cache.h" #define NFSDDBG_FACILITY NFSDDBG_XDR /* * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing * directory in order to indicate to the client that a filesystem boundary is present * We use a fixed fsid for a referral */ #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL static __be32 check_filename(char *str, int len, __be32 err) { int i; if (len == 0) return nfserr_inval; if (isdotent(str, len)) return err; for (i = 0; i < len; i++) if (str[i] == '/') return err; return 0; } #define DECODE_HEAD \ __be32 *p; \ __be32 status #define DECODE_TAIL \ status = 0; \ out: \ return status; \ xdr_error: \ dprintk("NFSD: xdr error (%s:%d)\n", \ __FILE__, __LINE__); \ 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 READTIME(x) do { \ p++; \ (x) = ntohl(*p++); \ p++; \ } while (0) #define READMEM(x,nbytes) do { \ x = (char *)p; \ p += XDR_QUADLEN(nbytes); \ } while (0) #define SAVEMEM(x,nbytes) do { \ if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ savemem(argp, p, nbytes) : \ (char *)p)) { \ dprintk("NFSD: xdr error (%s:%d)\n", \ __FILE__, __LINE__); \ goto xdr_error; \ } \ p += XDR_QUADLEN(nbytes); \ } while (0) #define COPYMEM(x,nbytes) do { \ memcpy((x), p, nbytes); \ p += XDR_QUADLEN(nbytes); \ } while (0) /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ #define READ_BUF(nbytes) do { \ if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ p = argp->p; \ argp->p += XDR_QUADLEN(nbytes); \ } else if (!(p = read_buf(argp, nbytes))) { \ dprintk("NFSD: xdr error (%s:%d)\n", \ __FILE__, __LINE__); \ goto xdr_error; \ } \ } while (0) static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep) { savep->p = argp->p; savep->end = argp->end; savep->pagelen = argp->pagelen; savep->pagelist = argp->pagelist; } static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep) { argp->p = savep->p; argp->end = savep->end; argp->pagelen = savep->pagelen; argp->pagelist = savep->pagelist; } static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) { /* We want more bytes than seem to be available. * Maybe we need a new page, maybe we have just run out */ unsigned int avail = (char *)argp->end - (char *)argp->p; __be32 *p; if (avail + argp->pagelen < nbytes) return NULL; if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ return NULL; /* ok, we can do it with the current plus the next page */ if (nbytes <= sizeof(argp->tmp)) p = argp->tmp; else { kfree(argp->tmpp); p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); if (!p) return NULL; } /* * The following memcpy is safe because read_buf is always * called with nbytes > avail, and the two cases above both * guarantee p points to at least nbytes bytes. */ memcpy(p, argp->p, avail); /* step to next page */ argp->p = page_address(argp->pagelist[0]); argp->pagelist++; if (argp->pagelen < PAGE_SIZE) { argp->end = argp->p + (argp->pagelen>>2); argp->pagelen = 0; } else { argp->end = argp->p + (PAGE_SIZE>>2); argp->pagelen -= PAGE_SIZE; } memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); argp->p += XDR_QUADLEN(nbytes - avail); return p; } static int zero_clientid(clientid_t *clid) { return (clid->cl_boot == 0) && (clid->cl_id == 0); } static int defer_free(struct nfsd4_compoundargs *argp, void (*release)(const void *), void *p) { struct tmpbuf *tb; tb = kmalloc(sizeof(*tb), GFP_KERNEL); if (!tb) return -ENOMEM; tb->buf = p; tb->release = release; tb->next = argp->to_free; argp->to_free = tb; return 0; } static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) { if (p == argp->tmp) { p = kmalloc(nbytes, GFP_KERNEL); if (!p) return NULL; memcpy(p, argp->tmp, nbytes); } else { BUG_ON(p != argp->tmpp); argp->tmpp = NULL; } if (defer_free(argp, kfree, p)) { kfree(p); return NULL; } else return (char *)p; } static __be32 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) { u32 bmlen; DECODE_HEAD; bmval[0] = 0; bmval[1] = 0; bmval[2] = 0; READ_BUF(4); READ32(bmlen); if (bmlen > 1000) goto xdr_error; READ_BUF(bmlen << 2); if (bmlen > 0) READ32(bmval[0]); if (bmlen > 1) READ32(bmval[1]); if (bmlen > 2) READ32(bmval[2]); DECODE_TAIL; } static __be32 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, struct nfs4_acl **acl) { int expected_len, len = 0; u32 dummy32; char *buf; int host_err; DECODE_HEAD; iattr->ia_valid = 0; if ((status = nfsd4_decode_bitmap(argp, bmval))) return status; READ_BUF(4); READ32(expected_len); if (bmval[0] & FATTR4_WORD0_SIZE) { READ_BUF(8); len += 8; READ64(iattr->ia_size); iattr->ia_valid |= ATTR_SIZE; } if (bmval[0] & FATTR4_WORD0_ACL) { int nace; struct nfs4_ace *ace; READ_BUF(4); len += 4; READ32(nace); if (nace > NFS4_ACL_MAX) return nfserr_resource; *acl = nfs4_acl_new(nace); if (*acl == NULL) { host_err = -ENOMEM; goto out_nfserr; } defer_free(argp, kfree, *acl); (*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); READ_BUF(dummy32); len += XDR_QUADLEN(dummy32) << 2; READMEM(buf, dummy32); ace->whotype = nfs4_acl_get_whotype(buf, dummy32); status = nfs_ok; if (ace->whotype != NFS4_ACL_WHO_NAMED) ace->who = 0; else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &ace->who); else status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &ace->who); if (status) return status; } } else *acl = NULL; if (bmval[1] & FATTR4_WORD1_MODE) { READ_BUF(4); len += 4; READ32(iattr->ia_mode); 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); READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) return status; iattr->ia_valid |= ATTR_UID; } if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { READ_BUF(4); len += 4; READ32(dummy32); READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) return status; iattr->ia_valid |= ATTR_GID; } if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { READ_BUF(4); len += 4; READ32(dummy32); 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; READ32(dummy32); if (dummy32) return nfserr_inval; READ32(iattr->ia_atime.tv_sec); READ32(iattr->ia_atime.tv_nsec); if (iattr->ia_atime.tv_nsec >= (u32)1000000000) return nfserr_inval; iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); break; case NFS4_SET_TO_SERVER_TIME: iattr->ia_valid |= ATTR_ATIME; break; default: goto xdr_error; } } if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { READ_BUF(4); len += 4; READ32(dummy32); 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; READ32(dummy32); if (dummy32) return nfserr_inval; READ32(iattr->ia_mtime.tv_sec); READ32(iattr->ia_mtime.tv_nsec); if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) return nfserr_inval; iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); break; case NFS4_SET_TO_SERVER_TIME: iattr->ia_valid |= ATTR_MTIME; break; default: goto xdr_error; } } if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) READ_BUF(expected_len - len); else if (len != expected_len) goto xdr_error; DECODE_TAIL; out_nfserr: status = nfserrno(host_err); goto out; } static __be32 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) { DECODE_HEAD; READ_BUF(sizeof(stateid_t)); READ32(sid->si_generation); COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); DECODE_TAIL; } static __be32 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) { DECODE_HEAD; READ_BUF(4); READ32(access->ac_req_access); DECODE_TAIL; } static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) { DECODE_HEAD; READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); READ32(bcts->dir); /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker * could help us figure out we should be using it. */ DECODE_TAIL; } static __be32 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) { DECODE_HEAD; close->cl_stateowner = NULL; READ_BUF(4); READ32(close->cl_seqid); return nfsd4_decode_stateid(argp, &close->cl_stateid); DECODE_TAIL; } static __be32 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) { DECODE_HEAD; READ_BUF(12); READ64(commit->co_offset); READ32(commit->co_count); DECODE_TAIL; } static __be32 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) { DECODE_HEAD; READ_BUF(4); READ32(create->cr_type); switch (create->cr_type) { case NF4LNK: READ_BUF(4); READ32(create->cr_linklen); 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); break; case NF4SOCK: case NF4FIFO: case NF4DIR: default: break; } READ_BUF(4); READ32(create->cr_namelen); READ_BUF(create->cr_namelen); SAVEMEM(create->cr_name, create->cr_namelen); if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) return status; status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl); if (status) goto out; DECODE_TAIL; } static inline __be32 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) { return nfsd4_decode_stateid(argp, &dr->dr_stateid); } static inline __be32 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) { return nfsd4_decode_bitmap(argp, getattr->ga_bmval); } static __be32 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) { DECODE_HEAD; READ_BUF(4); READ32(link->li_namelen); READ_BUF(link->li_namelen); SAVEMEM(link->li_name, link->li_namelen); if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) return status; DECODE_TAIL; } static __be32 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) { DECODE_HEAD; lock->lk_replay_owner = NULL; /* * type, reclaim(boolean), offset, length, new_lock_owner(boolean) */ READ_BUF(28); READ32(lock->lk_type); 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); if (lock->lk_is_new) { READ_BUF(4); READ32(lock->lk_new_open_seqid); 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); COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); READ32(lock->lk_new_owner.len); READ_BUF(lock->lk_new_owner.len); READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); } else { status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); if (status) return status; READ_BUF(4); READ32(lock->lk_old_lock_seqid); } DECODE_TAIL; } static __be32 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) { DECODE_HEAD; READ_BUF(32); READ32(lockt->lt_type); if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) goto xdr_error; READ64(lockt->lt_offset); READ64(lockt->lt_length); COPYMEM(&lockt->lt_clientid, 8); READ32(lockt->lt_owner.len); READ_BUF(lockt->lt_owner.len); READMEM(lockt->lt_owner.data, lockt->lt_owner.len); DECODE_TAIL; } static __be32 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) { DECODE_HEAD; locku->lu_stateowner = NULL; READ_BUF(8); READ32(locku->lu_type); if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) goto xdr_error; READ32(locku->lu_seqid); status = nfsd4_decode_stateid(argp, &locku->lu_stateid); if (status) return status; READ_BUF(16); READ64(locku->lu_offset); READ64(locku->lu_length); DECODE_TAIL; } static __be32 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) { DECODE_HEAD; READ_BUF(4); READ32(lookup->lo_len); READ_BUF(lookup->lo_len); SAVEMEM(lookup->lo_name, lookup->lo_len); if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) return status; DECODE_TAIL; } static __be32 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) { DECODE_HEAD; memset(open->op_bmval, 0, sizeof(open->op_bmval)); open->op_iattr.ia_valid = 0; open->op_stateowner = NULL; /* seqid, share_access, share_deny, clientid, ownerlen */ READ_BUF(16 + sizeof(clientid_t)); READ32(open->op_seqid); READ32(open->op_share_access); READ32(open->op_share_deny); COPYMEM(&open->op_clientid, sizeof(clientid_t)); READ32(open->op_owner.len); /* owner, open_flag */ READ_BUF(open->op_owner.len + 4); SAVEMEM(open->op_owner.data, open->op_owner.len); READ32(open->op_create); switch (open->op_create) { case NFS4_OPEN_NOCREATE: break; case NFS4_OPEN_CREATE: READ_BUF(4); READ32(open->op_createmode); switch (open->op_createmode) { case NFS4_CREATE_UNCHECKED: case NFS4_CREATE_GUARDED: status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl); if (status) goto out; break; case NFS4_CREATE_EXCLUSIVE: READ_BUF(8); COPYMEM(open->op_verf.data, 8); break; case NFS4_CREATE_EXCLUSIVE4_1: if (argp->minorversion < 1) goto xdr_error; READ_BUF(8); COPYMEM(open->op_verf.data, 8); status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl); if (status) goto out; break; default: goto xdr_error; } break; default: goto xdr_error; } /* open_claim */ READ_BUF(4); READ32(open->op_claim_type); switch (open->op_claim_type) { case NFS4_OPEN_CLAIM_NULL: case NFS4_OPEN_CLAIM_DELEGATE_PREV: READ_BUF(4); READ32(open->op_fname.len); 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, nfserr_inval))) return status; break; case NFS4_OPEN_CLAIM_PREVIOUS: READ_BUF(4); READ32(open->op_delegate_type); 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); 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, nfserr_inval))) return status; break; default: goto xdr_error; } DECODE_TAIL; } static __be32 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) { DECODE_HEAD; open_conf->oc_stateowner = NULL; status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); if (status) return status; READ_BUF(4); READ32(open_conf->oc_seqid); DECODE_TAIL; } static __be32 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) { DECODE_HEAD; open_down->od_stateowner = NULL; status = nfsd4_decode_stateid(argp, &open_down->od_stateid); if (status) return status; READ_BUF(12); READ32(open_down->od_seqid); READ32(open_down->od_share_access); READ32(open_down->od_share_deny); DECODE_TAIL; } static __be32 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) { DECODE_HEAD; READ_BUF(4); READ32(putfh->pf_fhlen); if (putfh->pf_fhlen > NFS4_FHSIZE) goto xdr_error; READ_BUF(putfh->pf_fhlen); SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); DECODE_TAIL; } static __be32 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) { DECODE_HEAD; status = nfsd4_decode_stateid(argp, &read->rd_stateid); if (status) return status; READ_BUF(12); READ64(read->rd_offset); READ32(read->rd_length); DECODE_TAIL; } static __be32 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) { DECODE_HEAD; READ_BUF(24); READ64(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); if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) goto out; DECODE_TAIL; } static __be32 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) { DECODE_HEAD; READ_BUF(4); READ32(remove->rm_namelen); READ_BUF(remove->rm_namelen); SAVEMEM(remove->rm_name, remove->rm_namelen); if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) return status; DECODE_TAIL; } static __be32 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) { DECODE_HEAD; READ_BUF(4); READ32(rename->rn_snamelen); READ_BUF(rename->rn_snamelen + 4); SAVEMEM(rename->rn_sname, rename->rn_snamelen); READ32(rename->rn_tnamelen); READ_BUF(rename->rn_tnamelen); SAVEMEM(rename->rn_tname, rename->rn_tnamelen); if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) return status; if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) return status; DECODE_TAIL; } static __be32 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) { DECODE_HEAD; READ_BUF(sizeof(clientid_t)); COPYMEM(clientid, sizeof(clientid_t)); DECODE_TAIL; } static __be32 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, struct nfsd4_secinfo *secinfo) { DECODE_HEAD; READ_BUF(4); READ32(secinfo->si_namelen); READ_BUF(secinfo->si_namelen); SAVEMEM(secinfo->si_name, secinfo->si_namelen); status = check_filename(secinfo->si_name, secinfo->si_namelen, nfserr_noent); if (status) return status; DECODE_TAIL; } static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, struct nfsd4_secinfo_no_name *sin) { DECODE_HEAD; READ_BUF(4); READ32(sin->sin_style); DECODE_TAIL; } static __be32 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) { __be32 status; status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); if (status) return status; return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl); } static __be32 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) { DECODE_HEAD; READ_BUF(12); COPYMEM(setclientid->se_verf.data, 8); READ32(setclientid->se_namelen); READ_BUF(setclientid->se_namelen + 8); SAVEMEM(setclientid->se_name, setclientid->se_namelen); READ32(setclientid->se_callback_prog); READ32(setclientid->se_callback_netid_len); 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); READ_BUF(setclientid->se_callback_addr_len + 4); SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); READ32(setclientid->se_callback_ident); DECODE_TAIL; } static __be32 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) { DECODE_HEAD; READ_BUF(8 + sizeof(nfs4_verifier)); COPYMEM(&scd_c->sc_clientid, 8); COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); DECODE_TAIL; } /* Also used for NVERIFY */ static __be32 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) { #if 0 struct nfsd4_compoundargs save = { .p = argp->p, .end = argp->end, .rqstp = argp->rqstp, }; u32 ve_bmval[2]; struct iattr ve_iattr; /* request */ struct nfs4_acl *ve_acl; /* request */ #endif DECODE_HEAD; if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) goto out; /* For convenience's sake, we compare raw xdr'd attributes in * nfsd4_proc_verify; however we still decode here just to return * correct error in case of bad xdr. */ #if 0 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl); if (status == nfserr_inval) { status = nfserrno(status); goto out; } #endif READ_BUF(4); READ32(verify->ve_attrlen); READ_BUF(verify->ve_attrlen); SAVEMEM(verify->ve_attrval, verify->ve_attrlen); DECODE_TAIL; } static __be32 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) { int avail; int v; int len; DECODE_HEAD; status = nfsd4_decode_stateid(argp, &write->wr_stateid); if (status) return status; READ_BUF(16); READ64(write->wr_offset); READ32(write->wr_stable_how); if (write->wr_stable_how > 2) goto xdr_error; READ32(write->wr_buflen); /* Sorry .. no magic macros for this.. * * READ_BUF(write->wr_buflen); * SAVEMEM(write->wr_buf, write->wr_buflen); */ avail = (char*)argp->end - (char*)argp->p; if (avail + argp->pagelen < write->wr_buflen) { dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); goto xdr_error; } argp->rqstp->rq_vec[0].iov_base = p; argp->rqstp->rq_vec[0].iov_len = avail; v = 0; len = write->wr_buflen; while (len > argp->rqstp->rq_vec[v].iov_len) { len -= argp->rqstp->rq_vec[v].iov_len; v++; argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); argp->pagelist++; if (argp->pagelen >= PAGE_SIZE) { argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; argp->pagelen -= PAGE_SIZE; } else { argp->rqstp->rq_vec[v].iov_len = argp->pagelen; argp->pagelen -= len; } } argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); argp->rqstp->rq_vec[v].iov_len = len; write->wr_vlen = v+1; DECODE_TAIL; } static __be32 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) { DECODE_HEAD; READ_BUF(12); COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); READ32(rlockowner->rl_owner.len); READ_BUF(rlockowner->rl_owner.len); READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) return nfserr_inval; DECODE_TAIL; } static __be32 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, struct nfsd4_exchange_id *exid) { int dummy, tmp; DECODE_HEAD; READ_BUF(NFS4_VERIFIER_SIZE); COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); READ_BUF(4); READ32(exid->clname.len); READ_BUF(exid->clname.len); SAVEMEM(exid->clname.data, exid->clname.len); READ_BUF(4); READ32(exid->flags); /* Ignore state_protect4_a */ READ_BUF(4); READ32(exid->spa_how); switch (exid->spa_how) { case SP4_NONE: break; case SP4_MACH_CRED: /* spo_must_enforce */ READ_BUF(4); READ32(dummy); READ_BUF(dummy * 4); p += dummy; /* spo_must_allow */ READ_BUF(4); READ32(dummy); READ_BUF(dummy * 4); p += dummy; break; case SP4_SSV: /* ssp_ops */ READ_BUF(4); READ32(dummy); READ_BUF(dummy * 4); p += dummy; READ_BUF(4); READ32(dummy); READ_BUF(dummy * 4); p += dummy; /* ssp_hash_algs<> */ READ_BUF(4); READ32(tmp); while (tmp--) { READ_BUF(4); READ32(dummy); READ_BUF(dummy); p += XDR_QUADLEN(dummy); } /* ssp_encr_algs<> */ READ_BUF(4); READ32(tmp); while (tmp--) { READ_BUF(4); READ32(dummy); READ_BUF(dummy); p += XDR_QUADLEN(dummy); } /* ssp_window and ssp_num_gss_handles */ READ_BUF(8); READ32(dummy); READ32(dummy); break; default: goto xdr_error; } /* Ignore Implementation ID */ READ_BUF(4); /* nfs_impl_id4 array length */ READ32(dummy); if (dummy > 1) goto xdr_error; if (dummy == 1) { /* nii_domain */ READ_BUF(4); READ32(dummy); READ_BUF(dummy); p += XDR_QUADLEN(dummy); /* nii_name */ READ_BUF(4); READ32(dummy); READ_BUF(dummy); p += XDR_QUADLEN(dummy); /* nii_date */ READ_BUF(12); p += 3; } DECODE_TAIL; } static __be32 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, struct nfsd4_create_session *sess) { DECODE_HEAD; u32 dummy; char *machine_name; int i; int nr_secflavs; READ_BUF(16); COPYMEM(&sess->clientid, 8); READ32(sess->seqid); READ32(sess->flags); /* 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); if (sess->fore_channel.nr_rdma_attrs == 1) { READ_BUF(4); READ32(sess->fore_channel.rdma_attrs); } else if (sess->fore_channel.nr_rdma_attrs > 1) { dprintk("Too many fore channel attr bitmaps!\n"); goto xdr_error; } /* 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); if (sess->back_channel.nr_rdma_attrs == 1) { READ_BUF(4); READ32(sess->back_channel.rdma_attrs); } else if (sess->back_channel.nr_rdma_attrs > 1) { dprintk("Too many back channel attr bitmaps!\n"); goto xdr_error; } READ_BUF(8); READ32(sess->callback_prog); /* callback_sec_params4 */ READ32(nr_secflavs); for (i = 0; i < nr_secflavs; ++i) { READ_BUF(4); READ32(dummy); switch (dummy) { case RPC_AUTH_NULL: /* Nothing to read */ break; case RPC_AUTH_UNIX: READ_BUF(8); /* stamp */ READ32(dummy); /* machine name */ READ32(dummy); READ_BUF(dummy); SAVEMEM(machine_name, dummy); /* uid, gid */ READ_BUF(8); READ32(sess->uid); READ32(sess->gid); /* more gids */ READ_BUF(4); READ32(dummy); READ_BUF(dummy * 4); break; case RPC_AUTH_GSS: dprintk("RPC_AUTH_GSS callback secflavor " "not supported!\n"); READ_BUF(8); /* gcbp_service */ READ32(dummy); /* gcbp_handle_from_server */ READ32(dummy); READ_BUF(dummy); p += XDR_QUADLEN(dummy); /* gcbp_handle_from_client */ READ_BUF(4); READ32(dummy); READ_BUF(dummy); break; default: dprintk("Illegal callback secflavor\n"); return nfserr_inval; } } DECODE_TAIL; } static __be32 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_session *destroy_session) { DECODE_HEAD; READ_BUF(NFS4_MAX_SESSIONID_LEN); COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); DECODE_TAIL; } static __be32 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_free_stateid *free_stateid) { DECODE_HEAD; READ_BUF(sizeof(stateid_t)); READ32(free_stateid->fr_stateid.si_generation); COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); DECODE_TAIL; } static __be32 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, struct nfsd4_sequence *seq) { DECODE_HEAD; 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); DECODE_TAIL; } static __be32 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) { unsigned int nbytes; stateid_t si; int i; __be32 *p; __be32 status; READ_BUF(4); test_stateid->ts_num_ids = ntohl(*p++); nbytes = test_stateid->ts_num_ids * sizeof(stateid_t); if (nbytes > (u32)((char *)argp->end - (char *)argp->p)) goto xdr_error; test_stateid->ts_saved_args = argp; save_buf(argp, &test_stateid->ts_savedp); for (i = 0; i < test_stateid->ts_num_ids; i++) { status = nfsd4_decode_stateid(argp, &si); if (status) return status; } status = 0; out: return status; xdr_error: dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); status = nfserr_bad_xdr; goto out; } static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) { DECODE_HEAD; READ_BUF(4); READ32(rc->rca_one_fs); DECODE_TAIL; } static __be32 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) { return nfs_ok; } static __be32 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) { return nfserr_notsupp; } typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); static nfsd4_dec nfsd4_dec_ops[] = { [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_READ] = (nfsd4_dec)nfsd4_decode_read, [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, }; static nfsd4_dec nfsd41_dec_ops[] = { [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_READ] = (nfsd4_dec)nfsd4_decode_read, [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, /* new operations for NFSv4.1 */ [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, }; struct nfsd4_minorversion_ops { nfsd4_dec *decoders; int nops; }; static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, }; static __be32 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) { DECODE_HEAD; struct nfsd4_op *op; struct nfsd4_minorversion_ops *ops; bool cachethis = false; int i; /* * XXX: According to spec, we should check the tag * for UTF-8 compliance. I'm postponing this for * now because it seems that some clients do use * binary tags. */ READ_BUF(4); READ32(argp->taglen); READ_BUF(argp->taglen + 8); SAVEMEM(argp->tag, argp->taglen); READ32(argp->minorversion); READ32(argp->opcnt); if (argp->taglen > NFSD4_MAX_TAGLEN) goto xdr_error; if (argp->opcnt > 100) goto xdr_error; if (argp->opcnt > ARRAY_SIZE(argp->iops)) { argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); if (!argp->ops) { argp->ops = argp->iops; dprintk("nfsd: couldn't allocate room for COMPOUND\n"); goto xdr_error; } } if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) argp->opcnt = 0; ops = &nfsd4_minorversion[argp->minorversion]; for (i = 0; i < argp->opcnt; i++) { op = &argp->ops[i]; op->replay = NULL; /* * We can't use READ_BUF() here because we need to handle * a missing opcode as an OP_WRITE + 1. So we need to check * to see if we're truly at the end of our buffer or if there * is another page we need to flip to. */ if (argp->p == argp->end) { if (argp->pagelen < 4) { /* There isn't an opcode still on the wire */ op->opnum = OP_WRITE + 1; op->status = nfserr_bad_xdr; argp->opcnt = i+1; break; } /* * False alarm. We just hit a page boundary, but there * is still data available. Move pointer across page * boundary. *snip from READ_BUF* */ argp->p = page_address(argp->pagelist[0]); argp->pagelist++; if (argp->pagelen < PAGE_SIZE) { argp->end = argp->p + (argp->pagelen>>2); argp->pagelen = 0; } else { argp->end = argp->p + (PAGE_SIZE>>2); argp->pagelen -= PAGE_SIZE; } } op->opnum = ntohl(*argp->p++); if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP) op->status = ops->decoders[op->opnum](argp, &op->u); else { 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); } /* Sessions make the DRC unnecessary: */ if (argp->minorversion) cachethis = false; 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)++ = n; } static void write64(__be32 **p, u64 n) { write32(p, (u32)(n >> 32)); write32(p, (u32)n); } static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) { if (IS_I_VERSION(inode)) { write64(p, inode->i_version); } else { write32(p, stat->ctime.tv_sec); write32(p, stat->ctime.tv_nsec); } } static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) { write32(p, c->atomic); if (c->change_supported) { write64(p, c->before_change); write64(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); } } #define RESERVE_SPACE(nbytes) do { \ p = resp->p; \ BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ } while (0) #define ADJUST_ARGS() resp->p = p /* * Header routine to setup seqid operation replay cache */ #define ENCODE_SEQID_OP_HEAD \ __be32 *save; \ \ save = resp->p; static bool seqid_mutating_err(__be32 err) { /* rfc 3530 section 8.1.5: */ return err != nfserr_stale_clientid && err != nfserr_stale_stateid && err != nfserr_bad_stateid && err != nfserr_bad_seqid && err != nfserr_bad_xdr && err != nfserr_resource && err != nfserr_nofilehandle; } /* * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This * is where sequence id's are incremented, and the replay cache is filled. * Note that we increment sequence id's here, at the last moment, so we're sure * we know whether the error to be returned is a sequence id mutating error. */ #define ENCODE_SEQID_OP_TAIL(stateowner) do { \ if (seqid_mutating_err(nfserr) && stateowner) { \ stateowner->so_seqid++; \ stateowner->so_replay.rp_status = nfserr; \ stateowner->so_replay.rp_buflen = \ (((char *)(resp)->p - (char *)save)); \ memcpy(stateowner->so_replay.rp_buf, save, \ stateowner->so_replay.rp_buflen); \ } } while (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) { __be32 *p = *pp; __be32 *countp = p; int strlen, count=0; char *str, *end; dprintk("nfsd4_encode_components(%s)\n", components); if ((*buflen -= 4) < 0) return nfserr_resource; WRITE32(0); /* We will fill this in with @count later */ end = str = components; while (*end) { for (; *end && (*end != sep); end++) ; /* Point to end of component */ strlen = end - str; if (strlen) { if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) return nfserr_resource; WRITE32(strlen); WRITEMEM(str, strlen); count++; } else end++; str = end; } *pp = p; p = countp; WRITE32(count); return 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) { __be32 status; __be32 *p = *pp; status = nfsd4_encode_components(':', location->hosts, &p, buflen); if (status) return status; status = nfsd4_encode_components('/', location->path, &p, buflen); if (status) return status; *pp = p; return 0; } /* * Return the path to an export point in the pseudo filesystem namespace * Returned string is safe to use as long as the caller holds a reference * to @exp. */ static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) { struct svc_fh tmp_fh; char *path = NULL, *rootpath; size_t rootlen; fh_init(&tmp_fh, NFS4_FHSIZE); *stat = exp_pseudoroot(rqstp, &tmp_fh); if (*stat) return NULL; rootpath = tmp_fh.fh_export->ex_pathname; path = exp->ex_pathname; rootlen = strlen(rootpath); if (strncmp(path, rootpath, rootlen)) { dprintk("nfsd: fs_locations failed;" "%s is not contained in %s\n", path, rootpath); *stat = nfserr_notsupp; path = NULL; goto out; } path += rootlen; out: fh_put(&tmp_fh); return path; } /* * encode a fs_locations structure */ static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, struct svc_export *exp, __be32 **pp, int *buflen) { __be32 status; int i; __be32 *p = *pp; struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; char *root = nfsd4_path(rqstp, exp, &status); if (status) return status; status = nfsd4_encode_components('/', root, &p, buflen); if (status) return status; if ((*buflen -= 4) < 0) return nfserr_resource; WRITE32(fslocs->locations_count); for (i=0; ilocations_count; i++) { status = nfsd4_encode_fs_location4(&fslocs->locations[i], &p, buflen); if (status) return status; } *pp = p; return 0; } static u32 nfs4_file_type(umode_t mode) { switch (mode & S_IFMT) { case S_IFIFO: return NF4FIFO; case S_IFCHR: return NF4CHR; case S_IFDIR: return NF4DIR; case S_IFBLK: return NF4BLK; case S_IFLNK: return NF4LNK; case S_IFREG: return NF4REG; case S_IFSOCK: return NF4SOCK; default: return NF4BAD; }; } static __be32 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, __be32 **p, int *buflen) { int status; if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) return nfserr_resource; if (whotype != NFS4_ACL_WHO_NAMED) status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); else if (group) status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); else status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); if (status < 0) return nfserrno(status); *p = xdr_encode_opaque(*p, NULL, status); *buflen -= (XDR_QUADLEN(status) << 2) + 4; BUG_ON(*buflen < 0); return 0; } static inline __be32 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) { return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); } static inline __be32 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) { return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); } static inline __be32 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, __be32 **p, int *buflen) { return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); } #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ FATTR4_WORD0_RDATTR_ERROR) #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) { /* As per referral draft: */ if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || *bmval0 & FATTR4_WORD0_FS_LOCATIONS) *rdattr_err = NFSERR_MOVED; else return nfserr_moved; } *bmval0 &= WORD0_ABSENT_FS_ATTRS; *bmval1 &= WORD1_ABSENT_FS_ATTRS; return 0; } /* * Note: @fhp can be NULL; in this case, we might have to compose the filehandle * ourselves. * * @countp is the buffer size in _words_; upon successful return this becomes * replaced with the number of words written. */ __be32 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, struct svc_rqst *rqstp, int ignore_crossmnt) { u32 bmval0 = bmval[0]; u32 bmval1 = bmval[1]; u32 bmval2 = bmval[2]; struct kstat stat; struct svc_fh tempfh; struct kstatfs statfs; int buflen = *countp << 2; __be32 *attrlenp; u32 dummy; u64 dummy64; u32 rdattr_err = 0; __be32 *p = buffer; __be32 status; int err; int aclsupport = 0; struct nfs4_acl *acl = NULL; struct nfsd4_compoundres *resp = rqstp->rq_resp; u32 minorversion = resp->cstate.minorversion; struct path path = { .mnt = exp->ex_path.mnt, .dentry = dentry, }; BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); if (exp->ex_fslocs.migrated) { BUG_ON(bmval[2]); status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); if (status) goto out; } err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); if (err) goto out_nfserr; if ((bmval0 & (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); if (err) goto out_nfserr; } if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { fh_init(&tempfh, NFS4_FHSIZE); status = fh_compose(&tempfh, exp, dentry, NULL); if (status) goto out; fhp = &tempfh; } if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_SUPPORTED_ATTRS)) { err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); aclsupport = (err == 0); if (bmval0 & FATTR4_WORD0_ACL) { if (err == -EOPNOTSUPP) bmval0 &= ~FATTR4_WORD0_ACL; else if (err == -EINVAL) { status = nfserr_attrnotsupp; goto out; } else if (err != 0) goto out_nfserr; } } if (bmval2) { if ((buflen -= 16) < 0) goto out_resource; WRITE32(3); WRITE32(bmval0); WRITE32(bmval1); WRITE32(bmval2); } else if (bmval1) { if ((buflen -= 12) < 0) goto out_resource; WRITE32(2); WRITE32(bmval0); WRITE32(bmval1); } else { if ((buflen -= 8) < 0) goto out_resource; WRITE32(1); WRITE32(bmval0); } attrlenp = p++; /* to be backfilled later */ if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { u32 word0 = nfsd_suppattrs0(minorversion); u32 word1 = nfsd_suppattrs1(minorversion); u32 word2 = nfsd_suppattrs2(minorversion); if (!aclsupport) word0 &= ~FATTR4_WORD0_ACL; if (!word2) { if ((buflen -= 12) < 0) goto out_resource; WRITE32(2); WRITE32(word0); WRITE32(word1); } else { if ((buflen -= 16) < 0) goto out_resource; WRITE32(3); WRITE32(word0); WRITE32(word1); WRITE32(word2); } } if (bmval0 & FATTR4_WORD0_TYPE) { if ((buflen -= 4) < 0) goto out_resource; dummy = nfs4_file_type(stat.mode); if (dummy == NF4BAD) goto out_serverfault; WRITE32(dummy); } if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { if ((buflen -= 4) < 0) goto out_resource; if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) WRITE32(NFS4_FH_PERSISTENT); else WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); } if (bmval0 & FATTR4_WORD0_CHANGE) { if ((buflen -= 8) < 0) goto out_resource; write_change(&p, &stat, dentry->d_inode); } if (bmval0 & FATTR4_WORD0_SIZE) { if ((buflen -= 8) < 0) goto out_resource; WRITE64(stat.size); } if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(1); } if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(1); } if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(0); } if (bmval0 & FATTR4_WORD0_FSID) { if ((buflen -= 16) < 0) goto out_resource; if (exp->ex_fslocs.migrated) { WRITE64(NFS4_REFERRAL_FSID_MAJOR); WRITE64(NFS4_REFERRAL_FSID_MINOR); } else switch(fsid_source(fhp)) { case FSIDSOURCE_FSID: WRITE64((u64)exp->ex_fsid); WRITE64((u64)0); break; case FSIDSOURCE_DEV: WRITE32(0); WRITE32(MAJOR(stat.dev)); WRITE32(0); WRITE32(MINOR(stat.dev)); break; case FSIDSOURCE_UUID: WRITEMEM(exp->ex_uuid, 16); break; } } if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(0); } if (bmval0 & FATTR4_WORD0_LEASE_TIME) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(nfsd4_lease); } if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(rdattr_err); } if (bmval0 & FATTR4_WORD0_ACL) { struct nfs4_ace *ace; if (acl == NULL) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(0); goto out_acl; } if ((buflen -= 4) < 0) goto out_resource; WRITE32(acl->naces); for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { if ((buflen -= 4*3) < 0) goto out_resource; WRITE32(ace->type); WRITE32(ace->flag); WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); status = nfsd4_encode_aclname(rqstp, ace->whotype, ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, &p, &buflen); if (status == nfserr_resource) goto out_resource; if (status) goto out; } } out_acl: if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(aclsupport ? ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); } if (bmval0 & FATTR4_WORD0_CANSETTIME) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(1); } if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(1); } if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(1); } if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(1); } if (bmval0 & FATTR4_WORD0_FILEHANDLE) { buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; if (buflen < 0) goto out_resource; WRITE32(fhp->fh_handle.fh_size); WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); } if (bmval0 & FATTR4_WORD0_FILEID) { if ((buflen -= 8) < 0) goto out_resource; WRITE64(stat.ino); } if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { if ((buflen -= 8) < 0) goto out_resource; WRITE64((u64) statfs.f_ffree); } if (bmval0 & FATTR4_WORD0_FILES_FREE) { if ((buflen -= 8) < 0) goto out_resource; WRITE64((u64) statfs.f_ffree); } if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { if ((buflen -= 8) < 0) goto out_resource; WRITE64((u64) statfs.f_files); } if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); if (status == nfserr_resource) goto out_resource; if (status) goto out; } if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(1); } if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { if ((buflen -= 8) < 0) goto out_resource; WRITE64(~(u64)0); } if (bmval0 & FATTR4_WORD0_MAXLINK) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(255); } if (bmval0 & FATTR4_WORD0_MAXNAME) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(statfs.f_namelen); } if (bmval0 & FATTR4_WORD0_MAXREAD) { if ((buflen -= 8) < 0) goto out_resource; WRITE64((u64) svc_max_payload(rqstp)); } if (bmval0 & FATTR4_WORD0_MAXWRITE) { if ((buflen -= 8) < 0) goto out_resource; WRITE64((u64) svc_max_payload(rqstp)); } if (bmval1 & FATTR4_WORD1_MODE) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(stat.mode & S_IALLUGO); } if (bmval1 & FATTR4_WORD1_NO_TRUNC) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(1); } if (bmval1 & FATTR4_WORD1_NUMLINKS) { if ((buflen -= 4) < 0) goto out_resource; WRITE32(stat.nlink); } if (bmval1 & FATTR4_WORD1_OWNER) { status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); if (status == nfserr_resource) goto out_resource; if (status) goto out; } if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); if (status == nfserr_resource) goto out_resource; if (status) goto out; } if (bmval1 & FATTR4_WORD1_RAWDEV) { if ((buflen -= 8) < 0) goto out_resource; WRITE32((u32) MAJOR(stat.rdev)); WRITE32((u32) MINOR(stat.rdev)); } if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { if ((buflen -= 8) < 0) goto out_resource; dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; WRITE64(dummy64); } if (bmval1 & FATTR4_WORD1_SPACE_FREE) { if ((buflen -= 8) < 0) goto out_resource; dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; WRITE64(dummy64); } if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { if ((buflen -= 8) < 0) goto out_resource; dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; WRITE64(dummy64); } if (bmval1 & FATTR4_WORD1_SPACE_USED) { if ((buflen -= 8) < 0) goto out_resource; dummy64 = (u64)stat.blocks << 9; WRITE64(dummy64); } if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { if ((buflen -= 12) < 0) goto out_resource; WRITE32(0); WRITE32(stat.atime.tv_sec); WRITE32(stat.atime.tv_nsec); } if (bmval1 & FATTR4_WORD1_TIME_DELTA) { if ((buflen -= 12) < 0) goto out_resource; WRITE32(0); WRITE32(1); WRITE32(0); } if (bmval1 & FATTR4_WORD1_TIME_METADATA) { if ((buflen -= 12) < 0) goto out_resource; WRITE32(0); WRITE32(stat.ctime.tv_sec); WRITE32(stat.ctime.tv_nsec); } if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { if ((buflen -= 12) < 0) goto out_resource; WRITE32(0); WRITE32(stat.mtime.tv_sec); WRITE32(stat.mtime.tv_nsec); } if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { if ((buflen -= 8) < 0) goto out_resource; /* * Get parent's attributes if not ignoring crossmount * and this is the root of a cross-mounted filesystem. */ if (ignore_crossmnt == 0 && dentry == exp->ex_path.mnt->mnt_root) { struct path path = exp->ex_path; path_get(&path); while (follow_up(&path)) { if (path.dentry != path.mnt->mnt_root) break; } err = vfs_getattr(path.mnt, path.dentry, &stat); path_put(&path); if (err) goto out_nfserr; } WRITE64(stat.ino); } if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { WRITE32(3); WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); } *attrlenp = htonl((char *)p - (char *)attrlenp - 4); *countp = p - buffer; status = nfs_ok; out: kfree(acl); if (fhp == &tempfh) fh_put(&tempfh); return status; out_nfserr: status = nfserrno(err); goto out; out_resource: *countp = 0; status = nfserr_resource; goto out; out_serverfault: status = nfserr_serverfault; goto out; } static inline int attributes_need_mount(u32 *bmval) { if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) return 1; if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) return 1; return 0; } static __be32 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, const char *name, int namlen, __be32 *p, int *buflen) { struct svc_export *exp = cd->rd_fhp->fh_export; struct dentry *dentry; __be32 nfserr; int ignore_crossmnt = 0; dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); if (IS_ERR(dentry)) return nfserrno(PTR_ERR(dentry)); if (!dentry->d_inode) { /* * nfsd_buffered_readdir drops the i_mutex between * readdir and calling this callback, leaving a window * where this directory entry could have gone away. */ dput(dentry); return nfserr_noent; } exp_get(exp); /* * In the case of a mountpoint, the client may be asking for * attributes that are only properties of the underlying filesystem * as opposed to the cross-mounted file system. In such a case, * we will not follow the cross mount and will fill the attribtutes * directly from the mountpoint dentry. */ if (nfsd_mountpoint(dentry, exp)) { int err; if (!(exp->ex_flags & NFSEXP_V4ROOT) && !attributes_need_mount(cd->rd_bmval)) { ignore_crossmnt = 1; goto out_encode; } /* * Why the heck aren't we just using nfsd_lookup?? * Different "."/".." handling? Something else? * At least, add a comment here to explain.... */ err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); if (err) { nfserr = nfserrno(err); goto out_put; } nfserr = check_nfsd_access(exp, cd->rd_rqstp); if (nfserr) goto out_put; } out_encode: nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, cd->rd_rqstp, ignore_crossmnt); out_put: dput(dentry); exp_put(exp); return nfserr; } static __be32 * nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) { __be32 *attrlenp; if (buflen < 6) return NULL; *p++ = htonl(2); *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ *p++ = htonl(0); /* bmval1 */ attrlenp = p++; *p++ = nfserr; /* no htonl */ *attrlenp = htonl((char *)p - (char *)attrlenp - 4); return p; } static int nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, loff_t offset, u64 ino, unsigned int d_type) { struct readdir_cd *ccd = ccdv; struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); int buflen; __be32 *p = cd->buffer; __be32 *cookiep; __be32 nfserr = nfserr_toosmall; /* In nfsv4, "." and ".." never make it onto the wire.. */ if (name && isdotent(name, namlen)) { cd->common.err = nfs_ok; return 0; } if (cd->offset) xdr_encode_hyper(cd->offset, (u64) offset); buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); if (buflen < 0) goto fail; *p++ = xdr_one; /* mark entry present */ cookiep = p; 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); switch (nfserr) { case nfs_ok: p += buflen; break; case nfserr_resource: nfserr = nfserr_toosmall; goto fail; case nfserr_noent: goto skip_entry; default: /* * If the client requested the RDATTR_ERROR attribute, * we stuff the error code into this attribute * and continue. If this attribute was not requested, * then in accordance with the spec, we fail the * entire READDIR operation(!) */ if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) goto fail; p = nfsd4_encode_rdattr_error(p, buflen, nfserr); if (p == NULL) { nfserr = nfserr_toosmall; goto fail; } } cd->buflen -= (p - cd->buffer); cd->buffer = p; cd->offset = cookiep; skip_entry: cd->common.err = nfs_ok; return 0; fail: cd->common.err = nfserr; return -EINVAL; } static void nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) { __be32 *p; RESERVE_SPACE(sizeof(stateid_t)); WRITE32(sid->si_generation); WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); ADJUST_ARGS(); } static __be32 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) { __be32 *p; if (!nfserr) { RESERVE_SPACE(8); WRITE32(access->ac_supported); WRITE32(access->ac_resp_access); ADJUST_ARGS(); } return nfserr; } static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) { __be32 *p; if (!nfserr) { RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8); WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); WRITE32(bcts->dir); /* XXX: ? */ WRITE32(0); ADJUST_ARGS(); } return nfserr; } static __be32 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) { ENCODE_SEQID_OP_HEAD; if (!nfserr) nfsd4_encode_stateid(resp, &close->cl_stateid); ENCODE_SEQID_OP_TAIL(close->cl_stateowner); return nfserr; } static __be32 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) { __be32 *p; if (!nfserr) { RESERVE_SPACE(8); WRITEMEM(commit->co_verf.data, 8); ADJUST_ARGS(); } return nfserr; } static __be32 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) { __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(); } return nfserr; } static __be32 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) { struct svc_fh *fhp = getattr->ga_fhp; int buflen; 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, resp->rqstp, 0); if (!nfserr) resp->p += buflen; return nfserr; } static __be32 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) { 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(); } return nfserr; } /* * 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) { __be32 *p; RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); WRITE64(ld->ld_start); WRITE64(ld->ld_length); WRITE32(ld->ld_type); if (ld->ld_sop) { WRITEMEM(&ld->ld_clientid, 8); WRITE32(ld->ld_sop->so_owner.len); WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ WRITE64((u64)0); /* clientid */ WRITE32(0); /* length of owner name */ } ADJUST_ARGS(); } static __be32 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) { ENCODE_SEQID_OP_HEAD; if (!nfserr) nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); else if (nfserr == nfserr_denied) nfsd4_encode_lock_denied(resp, &lock->lk_denied); ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); return nfserr; } static __be32 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) { if (nfserr == nfserr_denied) nfsd4_encode_lock_denied(resp, &lockt->lt_denied); return nfserr; } static __be32 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) { ENCODE_SEQID_OP_HEAD; if (!nfserr) nfsd4_encode_stateid(resp, &locku->lu_stateid); ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); return nfserr; } static __be32 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) { __be32 *p; if (!nfserr) { RESERVE_SPACE(20); write_cinfo(&p, &link->li_cinfo); ADJUST_ARGS(); } return nfserr; } static __be32 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) { __be32 *p; ENCODE_SEQID_OP_HEAD; 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(); 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); /* * 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(); break; case NFS4_OPEN_DELEGATE_WRITE: nfsd4_encode_stateid(resp, &open->op_delegate_stateid); RESERVE_SPACE(32); WRITE32(0); /* * TODO: space_limit's in delegations */ WRITE32(NFS4_LIMIT_SIZE); WRITE32(~(u32)0); WRITE32(~(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(); break; default: BUG(); } /* XXX save filehandle here */ out: ENCODE_SEQID_OP_TAIL(open->op_stateowner); return nfserr; } static __be32 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) { ENCODE_SEQID_OP_HEAD; if (!nfserr) nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); return nfserr; } static __be32 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) { ENCODE_SEQID_OP_HEAD; if (!nfserr) nfsd4_encode_stateid(resp, &od->od_stateid); ENCODE_SEQID_OP_TAIL(od->od_stateowner); return nfserr; } static __be32 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_read *read) { u32 eof; int v, pn; unsigned long maxcount; long len; __be32 *p; if (nfserr) return nfserr; if (resp->xbuf->page_len) return nfserr_resource; RESERVE_SPACE(8); /* eof flag and byte count */ maxcount = svc_max_payload(resp->rqstp); if (maxcount > read->rd_length) maxcount = read->rd_length; len = maxcount; v = 0; while (len > 0) { pn = resp->rqstp->rq_resused++; resp->rqstp->rq_vec[v].iov_base = page_address(resp->rqstp->rq_respages[pn]); resp->rqstp->rq_vec[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE; v++; len -= PAGE_SIZE; } 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); if (nfserr) return nfserr; 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; /* 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(); } return 0; } static __be32 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) { int maxcount; char *page; __be32 *p; if (nfserr) return nfserr; if (resp->xbuf->page_len) return nfserr_resource; page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); maxcount = PAGE_SIZE; RESERVE_SPACE(4); /* * 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); if (nfserr == nfserr_isdir) return nfserr_inval; if (nfserr) 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(); } return 0; } static __be32 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) { int maxcount; loff_t offset; __be32 *page, *savep, *tailbase; __be32 *p; if (nfserr) return nfserr; if (resp->xbuf->page_len) return nfserr_resource; RESERVE_SPACE(8); /* verifier */ savep = p; /* 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; /* * 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. */ maxcount = (maxcount >> 2) - 4; if (maxcount < 0) { nfserr = nfserr_toosmall; goto err_no_verf; } page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); readdir->common.err = 0; readdir->buflen = maxcount; readdir->buffer = page; readdir->offset = NULL; offset = readdir->rd_cookie; nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, &offset, &readdir->common, nfsd4_encode_dirent); if (nfserr == nfs_ok && readdir->common.err == nfserr_toosmall && readdir->buffer == page) nfserr = nfserr_toosmall; if (nfserr) goto err_no_verf; if (readdir->offset) xdr_encode_hyper(readdir->offset, offset); p = readdir->buffer; *p++ = 0; /* no more entries */ *p++ = htonl(readdir->common.err == nfserr_eof); resp->xbuf->page_len = ((char*)p) - (char*)page_address( resp->rqstp->rq_respages[resp->rqstp->rq_resused-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(); return nfserr; } static __be32 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) { __be32 *p; if (!nfserr) { RESERVE_SPACE(20); write_cinfo(&p, &remove->rm_cinfo); ADJUST_ARGS(); } return nfserr; } static __be32 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) { __be32 *p; if (!nfserr) { RESERVE_SPACE(40); write_cinfo(&p, &rename->rn_sinfo); write_cinfo(&p, &rename->rn_tinfo); ADJUST_ARGS(); } return nfserr; } static __be32 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,struct svc_export *exp) { int i = 0; u32 nflavs; struct exp_flavor_info *flavs; struct exp_flavor_info def_flavs[2]; __be32 *p; if (nfserr) goto out; if (exp->ex_nflavors) { flavs = exp->ex_flavors; nflavs = exp->ex_nflavors; } else { /* Handling of some defaults in absence of real secinfo: */ flavs = def_flavs; if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { nflavs = 2; flavs[0].pseudoflavor = RPC_AUTH_UNIX; flavs[1].pseudoflavor = RPC_AUTH_NULL; } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { nflavs = 1; flavs[0].pseudoflavor = svcauth_gss_flavor(exp->ex_client); } else { nflavs = 1; flavs[0].pseudoflavor = exp->ex_client->flavour->flavour; } } RESERVE_SPACE(4); WRITE32(nflavs); ADJUST_ARGS(); for (i = 0; i < nflavs; i++) { u32 flav = flavs[i].pseudoflavor; struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); if (gm) { RESERVE_SPACE(4); WRITE32(RPC_AUTH_GSS); ADJUST_ARGS(); RESERVE_SPACE(4 + gm->gm_oid.len); WRITE32(gm->gm_oid.len); WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); ADJUST_ARGS(); RESERVE_SPACE(4); WRITE32(0); /* qop */ ADJUST_ARGS(); RESERVE_SPACE(4); WRITE32(gss_pseudoflavor_to_service(gm, flav)); ADJUST_ARGS(); gss_mech_put(gm); } else { RESERVE_SPACE(4); WRITE32(flav); ADJUST_ARGS(); } } out: if (exp) exp_put(exp); return nfserr; } 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); } 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); } /* * The SETATTR encode routine is special -- it always encodes a bitmap, * regardless of the error status. */ static __be32 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) { __be32 *p; RESERVE_SPACE(12); if (nfserr) { WRITE32(2); WRITE32(0); WRITE32(0); } else { WRITE32(2); WRITE32(setattr->sa_bmval[0]); WRITE32(setattr->sa_bmval[1]); } ADJUST_ARGS(); return nfserr; } static __be32 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) { __be32 *p; if (!nfserr) { RESERVE_SPACE(8 + sizeof(nfs4_verifier)); WRITEMEM(&scd->se_clientid, 8); WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); ADJUST_ARGS(); } else if (nfserr == nfserr_clid_inuse) { RESERVE_SPACE(8); WRITE32(0); WRITE32(0); ADJUST_ARGS(); } return nfserr; } static __be32 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) { __be32 *p; if (!nfserr) { RESERVE_SPACE(16); WRITE32(write->wr_bytes_written); WRITE32(write->wr_how_written); WRITEMEM(write->wr_verifier.data, 8); ADJUST_ARGS(); } return nfserr; } static __be32 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_exchange_id *exid) { __be32 *p; char *major_id; char *server_scope; int major_id_sz; int server_scope_sz; uint64_t minor_id = 0; if (nfserr) return nfserr; major_id = utsname()->nodename; major_id_sz = strlen(major_id); server_scope = utsname()->nodename; server_scope_sz = strlen(server_scope); RESERVE_SPACE( 8 /* eir_clientid */ + 4 /* eir_sequenceid */ + 4 /* eir_flags */ + 4 /* spr_how (SP4_NONE) */ + 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) */); WRITEMEM(&exid->clientid, 8); WRITE32(exid->seqid); WRITE32(exid->flags); /* state_protect4_r. Currently only support SP4_NONE */ BUG_ON(exid->spa_how != SP4_NONE); WRITE32(exid->spa_how); /* The server_owner struct */ WRITE64(minor_id); /* Minor id */ /* major id */ WRITE32(major_id_sz); WRITEMEM(major_id, major_id_sz); /* Server scope */ WRITE32(server_scope_sz); WRITEMEM(server_scope, server_scope_sz); /* Implementation id */ WRITE32(0); /* zero length nfs_impl_id4 array */ ADJUST_ARGS(); return 0; } static __be32 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create_session *sess) { __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(); if (sess->fore_channel.nr_rdma_attrs) { RESERVE_SPACE(4); WRITE32(sess->fore_channel.rdma_attrs); ADJUST_ARGS(); } 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(); if (sess->back_channel.nr_rdma_attrs) { RESERVE_SPACE(4); WRITE32(sess->back_channel.rdma_attrs); ADJUST_ARGS(); } return 0; } static __be32 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_destroy_session *destroy_session) { return nfserr; } static __be32 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_free_stateid *free_stateid) { __be32 *p; if (nfserr) return nfserr; RESERVE_SPACE(4); WRITE32(nfserr); ADJUST_ARGS(); return nfserr; } static __be32 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_sequence *seq) { __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); WRITE32(seq->maxslots); /* For now: target_maxslots = maxslots */ WRITE32(seq->maxslots); WRITE32(seq->status_flags); ADJUST_ARGS(); resp->cstate.datap = p; /* DRC cache data pointer */ return 0; } __be32 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_test_stateid *test_stateid) { struct nfsd4_compoundargs *argp; stateid_t si; __be32 *p; int i; int valid; restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp); argp = test_stateid->ts_saved_args; RESERVE_SPACE(4); *p++ = htonl(test_stateid->ts_num_ids); resp->p = p; nfs4_lock_state(); for (i = 0; i < test_stateid->ts_num_ids; i++) { nfsd4_decode_stateid(argp, &si); valid = nfs4_validate_stateid(&si, test_stateid->ts_has_session); RESERVE_SPACE(4); *p++ = htonl(valid); resp->p = p; } nfs4_unlock_state(); return nfserr; } static __be32 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) { return nfserr; } typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); /* * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 * since we don't need to filter out obsolete ops as this is * done in the decoding phase. */ static nfsd4_enc nfsd4_enc_ops[] = { [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_READ] = (nfsd4_enc)nfsd4_encode_read, [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, /* NFSv4.1 operations */ [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid, [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, }; /* * Calculate the total amount of memory that the compound response has taken * after encoding the current operation. * * pad: add on 8 bytes for the next operation's op_code and status so that * there is room to cache a failure on the next operation. * * Compare this length to the session se_fmaxresp_cached. * * 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. */ static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp) { int status = 0; struct xdr_buf *xb = &resp->rqstp->rq_res; struct nfsd4_compoundargs *args = resp->rqstp->rq_argp; struct nfsd4_session *session = NULL; struct nfsd4_slot *slot = resp->cstate.slot; u32 length, tlen = 0, pad = 8; if (!nfsd4_has_session(&resp->cstate)) return status; session = resp->cstate.session; if (session == NULL || slot->sl_cachethis == 0) return status; if (resp->opcnt >= args->opcnt) pad = 0; /* this is the last operation */ 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_cached) return status; else return nfserr_rep_too_big_to_cache; } void nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) { __be32 *statp; __be32 *p; RESERVE_SPACE(8); WRITE32(op->opnum); statp = p++; /* to be backfilled at the end */ ADJUST_ARGS(); 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); /* nfsd4_check_drc_limit guarantees enough room for error status */ if (!op->status && nfsd4_check_drc_limit(resp)) op->status = nfserr_rep_too_big_to_cache; status: /* * Note: We write the status directly, instead of using WRITE32(), * since it is already in network byte order. */ *statp = op->status; } /* * Encode the reply stored in the stateowner reply cache * * XDR note: do not encode rp->rp_buflen: the buffer contains the * previously sent already encoded operation. * * called with nfs4_lock_state() held */ void nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) { __be32 *p; struct nfs4_replay *rp = op->replay; BUG_ON(!rp); RESERVE_SPACE(8); WRITE32(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(); } int nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) { return xdr_ressize_check(rqstp, p); } int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) { struct svc_rqst *rqstp = rq; struct nfsd4_compoundargs *args = rqstp->rq_argp; if (args->ops != args->iops) { kfree(args->ops); args->ops = args->iops; } kfree(args->tmpp); args->tmpp = NULL; while (args->to_free) { struct tmpbuf *tb = args->to_free; args->to_free = tb->next; tb->release(tb->buf); kfree(tb); } return 1; } int nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) { args->p = p; args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; args->pagelist = rqstp->rq_arg.pages; args->pagelen = rqstp->rq_arg.page_len; args->tmpp = NULL; args->to_free = NULL; args->ops = args->iops; args->rqstp = rqstp; return !nfsd4_decode_compound(args); } int nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) { /* * All that remains is to write the tag and operation count... */ struct nfsd4_compound_state *cs = &resp->cstate; struct kvec *iov; 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)) { if (cs->status != nfserr_replay_cache) { nfsd4_store_cache_entry(resp); dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); cs->slot->sl_inuse = false; } /* Renew the clientid on success and on replay */ release_session_client(cs->session); nfsd4_put_session(cs->session); } return 1; } /* * Local variables: * c-basic-offset: 8 * End: */