/* * Server-side procedures 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. */ #include #include #include "idmap.h" #include "cache.h" #include "xdr4.h" #include "vfs.h" #include "current_stateid.h" #include "netns.h" #include "acl.h" #ifdef CONFIG_NFSD_V4_SECURITY_LABEL #include static inline void nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) { struct inode *inode = resfh->fh_dentry->d_inode; int status; mutex_lock(&inode->i_mutex); status = security_inode_setsecctx(resfh->fh_dentry, label->data, label->len); mutex_unlock(&inode->i_mutex); if (status) /* * XXX: We should really fail the whole open, but we may * already have created a new file, so it may be too * late. For now this seems the least of evils: */ bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; return; } #else static inline void nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) { } #endif #define NFSDDBG_FACILITY NFSDDBG_PROC static u32 nfsd_attrmask[] = { NFSD_WRITEABLE_ATTRS_WORD0, NFSD_WRITEABLE_ATTRS_WORD1, NFSD_WRITEABLE_ATTRS_WORD2 }; static u32 nfsd41_ex_attrmask[] = { NFSD_SUPPATTR_EXCLCREAT_WORD0, NFSD_SUPPATTR_EXCLCREAT_WORD1, NFSD_SUPPATTR_EXCLCREAT_WORD2 }; static __be32 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, u32 *bmval, u32 *writable) { struct dentry *dentry = cstate->current_fh.fh_dentry; /* * Check about attributes are supported by the NFSv4 server or not. * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. */ if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) return nfserr_attrnotsupp; /* * Check FATTR4_WORD0_ACL can be supported * in current environment or not. */ if (bmval[0] & FATTR4_WORD0_ACL) { if (!IS_POSIXACL(dentry->d_inode)) return nfserr_attrnotsupp; } /* * According to spec, read-only attributes return ERR_INVAL. */ if (writable) { if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || (bmval[2] & ~writable[2])) return nfserr_inval; } return nfs_ok; } static __be32 nfsd4_check_open_attributes(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) { __be32 status = nfs_ok; if (open->op_create == NFS4_OPEN_CREATE) { if (open->op_createmode == NFS4_CREATE_UNCHECKED || open->op_createmode == NFS4_CREATE_GUARDED) status = check_attr_support(rqstp, cstate, open->op_bmval, nfsd_attrmask); else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) status = check_attr_support(rqstp, cstate, open->op_bmval, nfsd41_ex_attrmask); } return status; } static int is_create_with_attrs(struct nfsd4_open *open) { return open->op_create == NFS4_OPEN_CREATE && (open->op_createmode == NFS4_CREATE_UNCHECKED || open->op_createmode == NFS4_CREATE_GUARDED || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); } /* * if error occurs when setting the acl, just clear the acl bit * in the returned attr bitmap. */ static void do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_acl *acl, u32 *bmval) { __be32 status; status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); if (status) /* * We should probably fail the whole open at this point, * but we've already created the file, so it's too late; * So this seems the least of evils: */ bmval[0] &= ~FATTR4_WORD0_ACL; } static inline void fh_dup2(struct svc_fh *dst, struct svc_fh *src) { fh_put(dst); dget(src->fh_dentry); if (src->fh_export) exp_get(src->fh_export); *dst = *src; } static __be32 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) { __be32 status; if (open->op_truncate && !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) return nfserr_inval; accmode |= NFSD_MAY_READ_IF_EXEC; if (open->op_share_access & NFS4_SHARE_ACCESS_READ) accmode |= NFSD_MAY_READ; if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); if (open->op_share_deny & NFS4_SHARE_DENY_READ) accmode |= NFSD_MAY_WRITE; status = fh_verify(rqstp, current_fh, S_IFREG, accmode); return status; } static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) { umode_t mode = fh->fh_dentry->d_inode->i_mode; if (S_ISREG(mode)) return nfs_ok; if (S_ISDIR(mode)) return nfserr_isdir; /* * Using err_symlink as our catch-all case may look odd; but * there's no other obvious error for this case in 4.0, and we * happen to know that it will cause the linux v4 client to do * the right thing on attempts to open something other than a * regular file. */ return nfserr_symlink; } static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) { if (nfsd4_has_session(cstate)) return; fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, &resfh->fh_handle); } static __be32 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) { struct svc_fh *current_fh = &cstate->current_fh; int accmode; __be32 status; *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); if (!*resfh) return nfserr_jukebox; fh_init(*resfh, NFS4_FHSIZE); open->op_truncate = 0; if (open->op_create) { /* FIXME: check session persistence and pnfs flags. * The nfsv4.1 spec requires the following semantics: * * Persistent | pNFS | Server REQUIRED | Client Allowed * Reply Cache | server | | * -------------+--------+-----------------+-------------------- * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 * | | | (SHOULD) * | | and EXCLUSIVE4 | or EXCLUSIVE4 * | | | (SHOULD NOT) * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 * yes | no | GUARDED4 | GUARDED4 * yes | yes | GUARDED4 | GUARDED4 */ /* * Note: create modes (UNCHECKED,GUARDED...) are the same * in NFSv4 as in v3 except EXCLUSIVE4_1. */ status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, open->op_fname.len, &open->op_iattr, *resfh, open->op_createmode, (u32 *)open->op_verf.data, &open->op_truncate, &open->op_created); if (!status && open->op_label.len) nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); /* * Following rfc 3530 14.2.16, use the returned bitmask * to indicate which attributes we used to store the * verifier: */ if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_MODIFY); } else /* * Note this may exit with the parent still locked. * We will hold the lock until nfsd4_open's final * lookup, to prevent renames or unlinks until we've had * a chance to an acquire a delegation if appropriate. */ status = nfsd_lookup(rqstp, current_fh, open->op_fname.data, open->op_fname.len, *resfh); if (status) goto out; status = nfsd_check_obj_isreg(*resfh); if (status) goto out; if (is_create_with_attrs(open) && open->op_acl != NULL) do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); accmode = NFSD_MAY_NOP; if (open->op_created || open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) accmode |= NFSD_MAY_OWNER_OVERRIDE; status = do_open_permission(rqstp, *resfh, open, accmode); set_change_info(&open->op_cinfo, current_fh); out: return status; } static __be32 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) { struct svc_fh *current_fh = &cstate->current_fh; __be32 status; int accmode = 0; /* We don't know the target directory, and therefore can not * set the change info */ memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && (open->op_iattr.ia_size == 0); /* * In the delegation case, the client is telling us about an * open that it *already* performed locally, some time ago. We * should let it succeed now if possible. * * In the case of a CLAIM_FH open, on the other hand, the client * may be counting on us to enforce permissions (the Linux 4.1 * client uses this for normal opens, for example). */ if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) accmode = NFSD_MAY_OWNER_OVERRIDE; status = do_open_permission(rqstp, current_fh, open, accmode); return status; } static void copy_clientid(clientid_t *clid, struct nfsd4_session *session) { struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)session->se_sessionid.data; clid->cl_boot = sid->clientid.cl_boot; clid->cl_id = sid->clientid.cl_id; } static __be32 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) { __be32 status; struct svc_fh *resfh = NULL; struct nfsd4_compoundres *resp; struct net *net = SVC_NET(rqstp); struct nfsd_net *nn = net_generic(net, nfsd_net_id); dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", (int)open->op_fname.len, open->op_fname.data, open->op_openowner); /* This check required by spec. */ if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) return nfserr_inval; open->op_created = 0; /* * RFC5661 18.51.3 * Before RECLAIM_COMPLETE done, server should deny new lock */ if (nfsd4_has_session(cstate) && !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->session->se_client->cl_flags) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) return nfserr_grace; if (nfsd4_has_session(cstate)) copy_clientid(&open->op_clientid, cstate->session); /* check seqid for replay. set nfs4_owner */ resp = rqstp->rq_resp; status = nfsd4_process_open1(&resp->cstate, open, nn); if (status == nfserr_replay_me) { struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; fh_put(&cstate->current_fh); fh_copy_shallow(&cstate->current_fh.fh_handle, &rp->rp_openfh); status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); if (status) dprintk("nfsd4_open: replay failed" " restoring previous filehandle\n"); else status = nfserr_replay_me; } if (status) goto out; if (open->op_xdr_error) { status = open->op_xdr_error; goto out; } status = nfsd4_check_open_attributes(rqstp, cstate, open); if (status) goto out; /* Openowner is now set, so sequence id will get bumped. Now we need * these checks before we do any creates: */ status = nfserr_grace; if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) goto out; status = nfserr_no_grace; if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) goto out; switch (open->op_claim_type) { case NFS4_OPEN_CLAIM_DELEGATE_CUR: case NFS4_OPEN_CLAIM_NULL: status = do_open_lookup(rqstp, cstate, open, &resfh); if (status) goto out; break; case NFS4_OPEN_CLAIM_PREVIOUS: status = nfs4_check_open_reclaim(&open->op_clientid, cstate, nn); if (status) goto out; open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; case NFS4_OPEN_CLAIM_FH: case NFS4_OPEN_CLAIM_DELEG_CUR_FH: status = do_open_fhandle(rqstp, cstate, open); if (status) goto out; resfh = &cstate->current_fh; break; case NFS4_OPEN_CLAIM_DELEG_PREV_FH: case NFS4_OPEN_CLAIM_DELEGATE_PREV: dprintk("NFSD: unsupported OPEN claim type %d\n", open->op_claim_type); status = nfserr_notsupp; goto out; default: dprintk("NFSD: Invalid OPEN claim type %d\n", open->op_claim_type); status = nfserr_inval; goto out; } /* * nfsd4_process_open2() does the actual opening of the file. If * successful, it (1) truncates the file if open->op_truncate was * set, (2) sets open->op_stateid, (3) sets open->op_delegation. */ status = nfsd4_process_open2(rqstp, resfh, open); WARN(status && open->op_created, "nfsd4_process_open2 failed to open newly-created file! status=%u\n", be32_to_cpu(status)); out: if (resfh && resfh != &cstate->current_fh) { fh_dup2(&cstate->current_fh, resfh); fh_put(resfh); kfree(resfh); } nfsd4_cleanup_open_state(cstate, open, status); nfsd4_bump_seqid(cstate, status); return status; } /* * OPEN is the only seqid-mutating operation whose decoding can fail * with a seqid-mutating error (specifically, decoding of user names in * the attributes). Therefore we have to do some processing to look up * the stateowner so that we can bump the seqid. */ static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) { struct nfsd4_open *open = (struct nfsd4_open *)&op->u; if (!seqid_mutating_err(ntohl(op->status))) return op->status; if (nfsd4_has_session(cstate)) return op->status; open->op_xdr_error = op->status; return nfsd4_open(rqstp, cstate, open); } /* * filehandle-manipulating ops. */ static __be32 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct svc_fh **getfh) { if (!cstate->current_fh.fh_dentry) return nfserr_nofilehandle; *getfh = &cstate->current_fh; return nfs_ok; } static __be32 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_putfh *putfh) { fh_put(&cstate->current_fh); cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen); return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); } static __be32 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, void *arg) { __be32 status; fh_put(&cstate->current_fh); status = exp_pseudoroot(rqstp, &cstate->current_fh); return status; } static __be32 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, void *arg) { if (!cstate->save_fh.fh_dentry) return nfserr_restorefh; fh_dup2(&cstate->current_fh, &cstate->save_fh); if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); } return nfs_ok; } static __be32 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, void *arg) { if (!cstate->current_fh.fh_dentry) return nfserr_nofilehandle; fh_dup2(&cstate->save_fh, &cstate->current_fh); if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); } return nfs_ok; } /* * misc nfsv4 ops */ static __be32 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_access *access) { if (access->ac_req_access & ~NFS3_ACCESS_FULL) return nfserr_inval; access->ac_resp_access = access->ac_req_access; return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, &access->ac_supported); } static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) { __be32 verf[2]; struct nfsd_net *nn = net_generic(net, nfsd_net_id); /* * This is opaque to client, so no need to byte-swap. Use * __force to keep sparse happy */ verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; memcpy(verifier->data, verf, sizeof(verifier->data)); } static __be32 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_commit *commit) { gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, commit->co_count); } static __be32 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_create *create) { struct svc_fh resfh; __be32 status; dev_t rdev; fh_init(&resfh, NFS4_FHSIZE); status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_CREATE); if (status) return status; status = check_attr_support(rqstp, cstate, create->cr_bmval, nfsd_attrmask); if (status) return status; switch (create->cr_type) { case NF4LNK: status = nfsd_symlink(rqstp, &cstate->current_fh, create->cr_name, create->cr_namelen, create->cr_data, &resfh); break; case NF4BLK: rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); if (MAJOR(rdev) != create->cr_specdata1 || MINOR(rdev) != create->cr_specdata2) return nfserr_inval; status = nfsd_create(rqstp, &cstate->current_fh, create->cr_name, create->cr_namelen, &create->cr_iattr, S_IFBLK, rdev, &resfh); break; case NF4CHR: rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); if (MAJOR(rdev) != create->cr_specdata1 || MINOR(rdev) != create->cr_specdata2) return nfserr_inval; status = nfsd_create(rqstp, &cstate->current_fh, create->cr_name, create->cr_namelen, &create->cr_iattr,S_IFCHR, rdev, &resfh); break; case NF4SOCK: status = nfsd_create(rqstp, &cstate->current_fh, create->cr_name, create->cr_namelen, &create->cr_iattr, S_IFSOCK, 0, &resfh); break; case NF4FIFO: status = nfsd_create(rqstp, &cstate->current_fh, create->cr_name, create->cr_namelen, &create->cr_iattr, S_IFIFO, 0, &resfh); break; case NF4DIR: create->cr_iattr.ia_valid &= ~ATTR_SIZE; status = nfsd_create(rqstp, &cstate->current_fh, create->cr_name, create->cr_namelen, &create->cr_iattr, S_IFDIR, 0, &resfh); break; default: status = nfserr_badtype; } if (status) goto out; if (create->cr_label.len) nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); if (create->cr_acl != NULL) do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, create->cr_bmval); fh_unlock(&cstate->current_fh); set_change_info(&create->cr_cinfo, &cstate->current_fh); fh_dup2(&cstate->current_fh, &resfh); out: fh_put(&resfh); return status; } static __be32 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_getattr *getattr) { __be32 status; status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); if (status) return status; if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) return nfserr_inval; getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); getattr->ga_fhp = &cstate->current_fh; return nfs_ok; } static __be32 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_link *link) { __be32 status = nfserr_nofilehandle; if (!cstate->save_fh.fh_dentry) return status; status = nfsd_link(rqstp, &cstate->current_fh, link->li_name, link->li_namelen, &cstate->save_fh); if (!status) set_change_info(&link->li_cinfo, &cstate->current_fh); return status; } static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) { struct svc_fh tmp_fh; __be32 ret; fh_init(&tmp_fh, NFS4_FHSIZE); ret = exp_pseudoroot(rqstp, &tmp_fh); if (ret) return ret; if (tmp_fh.fh_dentry == fh->fh_dentry) { fh_put(&tmp_fh); return nfserr_noent; } fh_put(&tmp_fh); return nfsd_lookup(rqstp, fh, "..", 2, fh); } static __be32 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, void *arg) { return nfsd4_do_lookupp(rqstp, &cstate->current_fh); } static __be32 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_lookup *lookup) { return nfsd_lookup(rqstp, &cstate->current_fh, lookup->lo_name, lookup->lo_len, &cstate->current_fh); } static __be32 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_read *read) { __be32 status; /* no need to check permission - this will be done in nfsd_read() */ read->rd_filp = NULL; if (read->rd_offset >= OFFSET_MAX) return nfserr_inval; /* * If we do a zero copy read, then a client will see read data * that reflects the state of the file *after* performing the * following compound. * * To ensure proper ordering, we therefore turn off zero copy if * the client wants us to do more in this compound: */ if (!nfsd4_last_compound_op(rqstp)) rqstp->rq_splice_ok = false; /* check stateid */ if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, &read->rd_stateid, RD_STATE, &read->rd_filp))) { dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); goto out; } status = nfs_ok; out: read->rd_rqstp = rqstp; read->rd_fhp = &cstate->current_fh; return status; } static __be32 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_readdir *readdir) { u64 cookie = readdir->rd_cookie; static const nfs4_verifier zeroverf; /* no need to check permission - this will be done in nfsd_readdir() */ if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) return nfserr_inval; readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); if ((cookie == 1) || (cookie == 2) || (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) return nfserr_bad_cookie; readdir->rd_rqstp = rqstp; readdir->rd_fhp = &cstate->current_fh; return nfs_ok; } static __be32 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_readlink *readlink) { readlink->rl_rqstp = rqstp; readlink->rl_fhp = &cstate->current_fh; return nfs_ok; } static __be32 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_remove *remove) { __be32 status; if (locks_in_grace(SVC_NET(rqstp))) return nfserr_grace; status = nfsd_unlink(rqstp, &cstate->current_fh, 0, remove->rm_name, remove->rm_namelen); if (!status) { fh_unlock(&cstate->current_fh); set_change_info(&remove->rm_cinfo, &cstate->current_fh); } return status; } static __be32 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_rename *rename) { __be32 status = nfserr_nofilehandle; if (!cstate->save_fh.fh_dentry) return status; if (locks_in_grace(SVC_NET(rqstp)) && !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) return nfserr_grace; status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, rename->rn_snamelen, &cstate->current_fh, rename->rn_tname, rename->rn_tnamelen); if (status) return status; set_change_info(&rename->rn_sinfo, &cstate->current_fh); set_change_info(&rename->rn_tinfo, &cstate->save_fh); return nfs_ok; } static __be32 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_secinfo *secinfo) { struct svc_fh resfh; struct svc_export *exp; struct dentry *dentry; __be32 err; fh_init(&resfh, NFS4_FHSIZE); err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); if (err) return err; err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, secinfo->si_name, secinfo->si_namelen, &exp, &dentry); if (err) return err; if (dentry->d_inode == NULL) { exp_put(exp); err = nfserr_noent; } else secinfo->si_exp = exp; dput(dentry); if (cstate->minorversion) /* See rfc 5661 section 2.6.3.1.1.8 */ fh_put(&cstate->current_fh); return err; } static __be32 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_secinfo_no_name *sin) { __be32 err; switch (sin->sin_style) { case NFS4_SECINFO_STYLE4_CURRENT_FH: break; case NFS4_SECINFO_STYLE4_PARENT: err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); if (err) return err; break; default: return nfserr_inval; } sin->sin_exp = exp_get(cstate->current_fh.fh_export); fh_put(&cstate->current_fh); return nfs_ok; } static __be32 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) { __be32 status = nfs_ok; int err; if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, &setattr->sa_stateid, WR_STATE, NULL); if (status) { dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); return status; } } err = fh_want_write(&cstate->current_fh); if (err) return nfserrno(err); status = nfs_ok; status = check_attr_support(rqstp, cstate, setattr->sa_bmval, nfsd_attrmask); if (status) goto out; if (setattr->sa_acl != NULL) status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, setattr->sa_acl); if (status) goto out; if (setattr->sa_label.len) status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, &setattr->sa_label); if (status) goto out; status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 0, (time_t)0); out: fh_drop_write(&cstate->current_fh); return status; } static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) { int i = 1; int buflen = write->wr_buflen; vec[0].iov_base = write->wr_head.iov_base; vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); buflen -= vec[0].iov_len; while (buflen) { vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); buflen -= vec[i].iov_len; i++; } return i; } static __be32 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_write *write) { stateid_t *stateid = &write->wr_stateid; struct file *filp = NULL; __be32 status = nfs_ok; unsigned long cnt; int nvecs; /* no need to check permission - this will be done in nfsd_write() */ if (write->wr_offset >= OFFSET_MAX) return nfserr_inval; status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, stateid, WR_STATE, &filp); if (status) { dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); return status; } cnt = write->wr_buflen; write->wr_how_written = write->wr_stable_how; gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); nvecs = fill_in_write_vector(rqstp->rq_vec, write); WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); status = nfsd_write(rqstp, &cstate->current_fh, filp, write->wr_offset, rqstp->rq_vec, nvecs, &cnt, &write->wr_how_written); if (filp) fput(filp); write->wr_bytes_written = cnt; return status; } /* This routine never returns NFS_OK! If there are no other errors, it * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the * attributes matched. VERIFY is implemented by mapping NFSERR_SAME * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. */ static __be32 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_verify *verify) { __be32 *buf, *p; int count; __be32 status; status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); if (status) return status; status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); if (status) return status; if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) return nfserr_inval; if (verify->ve_attrlen & 3) return nfserr_inval; /* count in words: * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 */ count = 4 + (verify->ve_attrlen >> 2); buf = kmalloc(count << 2, GFP_KERNEL); if (!buf) return nfserr_jukebox; p = buf; status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, cstate->current_fh.fh_export, cstate->current_fh.fh_dentry, verify->ve_bmval, rqstp, 0); /* * If nfsd4_encode_fattr() ran out of space, assume that's because * the attributes are longer (hence different) than those given: */ if (status == nfserr_resource) status = nfserr_not_same; if (status) goto out_kfree; /* skip bitmap */ p = buf + 1 + ntohl(buf[0]); status = nfserr_not_same; if (ntohl(*p++) != verify->ve_attrlen) goto out_kfree; if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) status = nfserr_same; out_kfree: kfree(buf); return status; } static __be32 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_verify *verify) { __be32 status; status = _nfsd4_verify(rqstp, cstate, verify); return status == nfserr_not_same ? nfs_ok : status; } static __be32 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_verify *verify) { __be32 status; status = _nfsd4_verify(rqstp, cstate, verify); return status == nfserr_same ? nfs_ok : status; } /* * NULL call. */ static __be32 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) { return nfs_ok; } static inline void nfsd4_increment_op_stats(u32 opnum) { if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) nfsdstats.nfs4_opcount[opnum]++; } typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, void *); typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); enum nfsd4_op_flags { ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ /* For rfc 5661 section 2.6.3.1.1: */ OP_HANDLES_WRONGSEC = 1 << 3, OP_IS_PUTFH_LIKE = 1 << 4, /* * These are the ops whose result size we estimate before * encoding, to avoid performing an op then not being able to * respond or cache a response. This includes writes and setattrs * as well as the operations usually called "nonidempotent": */ OP_MODIFIES_SOMETHING = 1 << 5, /* * Cache compounds containing these ops in the xid-based drc: * We use the DRC for compounds containing non-idempotent * operations, *except* those that are 4.1-specific (since * sessions provide their own EOS), and except for stateful * operations other than setclientid and setclientid_confirm * (since sequence numbers provide EOS for open, lock, etc in * the v4.0 case). */ OP_CACHEME = 1 << 6, /* * These are ops which clear current state id. */ OP_CLEAR_STATEID = 1 << 7, }; struct nfsd4_operation { nfsd4op_func op_func; u32 op_flags; char *op_name; /* Try to get response size before operation */ nfsd4op_rsize op_rsize_bop; stateid_getter op_get_currentstateid; stateid_setter op_set_currentstateid; }; static struct nfsd4_operation nfsd4_ops[]; static const char *nfsd4_op_name(unsigned opnum); /* * Enforce NFSv4.1 COMPOUND ordering rules: * * Also note, enforced elsewhere: * - SEQUENCE other than as first op results in * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) * - BIND_CONN_TO_SESSION must be the only op in its compound. * (Enforced in nfsd4_bind_conn_to_session().) * - DESTROY_SESSION must be the final operation in a compound, if * sessionid's in SEQUENCE and DESTROY_SESSION are the same. * (Enforced in nfsd4_destroy_session().) */ static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) { struct nfsd4_op *op = &args->ops[0]; /* These ordering requirements don't apply to NFSv4.0: */ if (args->minorversion == 0) return nfs_ok; /* This is weird, but OK, not our problem: */ if (args->opcnt == 0) return nfs_ok; if (op->status == nfserr_op_illegal) return nfs_ok; if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) return nfserr_op_not_in_session; if (op->opnum == OP_SEQUENCE) return nfs_ok; if (args->opcnt != 1) return nfserr_not_only_op; return nfs_ok; } static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) { return &nfsd4_ops[op->opnum]; } bool nfsd4_cache_this_op(struct nfsd4_op *op) { if (op->opnum == OP_ILLEGAL) return false; return OPDESC(op)->op_flags & OP_CACHEME; } static bool need_wrongsec_check(struct svc_rqst *rqstp) { struct nfsd4_compoundres *resp = rqstp->rq_resp; struct nfsd4_compoundargs *argp = rqstp->rq_argp; struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; struct nfsd4_op *next = &argp->ops[resp->opcnt]; struct nfsd4_operation *thisd; struct nfsd4_operation *nextd; thisd = OPDESC(this); /* * Most ops check wronsec on our own; only the putfh-like ops * have special rules. */ if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) return false; /* * rfc 5661 2.6.3.1.1.6: don't bother erroring out a * put-filehandle operation if we're not going to use the * result: */ if (argp->opcnt == resp->opcnt) return false; nextd = OPDESC(next); /* * Rest of 2.6.3.1.1: certain operations will return WRONGSEC * errors themselves as necessary; others should check for them * now: */ return !(nextd->op_flags & OP_HANDLES_WRONGSEC); } static void svcxdr_init_encode(struct svc_rqst *rqstp, struct nfsd4_compoundres *resp) { struct xdr_stream *xdr = &resp->xdr; struct xdr_buf *buf = &rqstp->rq_res; struct kvec *head = buf->head; xdr->buf = buf; xdr->iov = head; xdr->p = head->iov_base + head->iov_len; xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; /* Tail and page_len should be zero at this point: */ buf->len = buf->head[0].iov_len; xdr->scratch.iov_len = 0; xdr->page_ptr = buf->pages - 1; buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) - rqstp->rq_auth_slack; } /* * COMPOUND call. */ static __be32 nfsd4_proc_compound(struct svc_rqst *rqstp, struct nfsd4_compoundargs *args, struct nfsd4_compoundres *resp) { struct nfsd4_op *op; struct nfsd4_operation *opdesc; struct nfsd4_compound_state *cstate = &resp->cstate; struct svc_fh *current_fh = &cstate->current_fh; struct svc_fh *save_fh = &cstate->save_fh; __be32 status; svcxdr_init_encode(rqstp, resp); resp->tagp = resp->xdr.p; /* reserve space for: taglen, tag, and opcnt */ xdr_reserve_space(&resp->xdr, 8 + args->taglen); resp->taglen = args->taglen; resp->tag = args->tag; resp->rqstp = rqstp; cstate->minorversion = args->minorversion; fh_init(current_fh, NFS4_FHSIZE); fh_init(save_fh, NFS4_FHSIZE); /* * Don't use the deferral mechanism for NFSv4; compounds make it * too hard to avoid non-idempotency problems. */ rqstp->rq_usedeferral = false; /* * According to RFC3010, this takes precedence over all other errors. */ status = nfserr_minor_vers_mismatch; if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) goto out; status = nfs41_check_op_ordering(args); if (status) { op = &args->ops[0]; op->status = status; goto encode_op; } while (!status && resp->opcnt < args->opcnt) { op = &args->ops[resp->opcnt++]; dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", resp->opcnt, args->opcnt, op->opnum, nfsd4_op_name(op->opnum)); /* * The XDR decode routines may have pre-set op->status; * for example, if there is a miscellaneous XDR error * it will be set to nfserr_bad_xdr. */ if (op->status) { if (op->opnum == OP_OPEN) op->status = nfsd4_open_omfg(rqstp, cstate, op); goto encode_op; } opdesc = OPDESC(op); if (!current_fh->fh_dentry) { if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { op->status = nfserr_nofilehandle; goto encode_op; } } else if (current_fh->fh_export->ex_fslocs.migrated && !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { op->status = nfserr_moved; goto encode_op; } fh_clear_wcc(current_fh); /* If op is non-idempotent */ if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { /* * Don't execute this op if we couldn't encode a * succesful reply: */ u32 plen = opdesc->op_rsize_bop(rqstp, op); /* * Plus if there's another operation, make sure * we'll have space to at least encode an error: */ if (resp->opcnt < args->opcnt) plen += COMPOUND_ERR_SLACK_SPACE; op->status = nfsd4_check_resp_size(resp, plen); } if (op->status) goto encode_op; if (opdesc->op_get_currentstateid) opdesc->op_get_currentstateid(cstate, &op->u); op->status = opdesc->op_func(rqstp, cstate, &op->u); if (!op->status) { if (opdesc->op_set_currentstateid) opdesc->op_set_currentstateid(cstate, &op->u); if (opdesc->op_flags & OP_CLEAR_STATEID) clear_current_stateid(cstate); if (need_wrongsec_check(rqstp)) op->status = check_nfsd_access(current_fh->fh_export, rqstp); } encode_op: /* Only from SEQUENCE */ if (cstate->status == nfserr_replay_cache) { dprintk("%s NFS4.1 replay from cache\n", __func__); status = op->status; goto out; } if (op->status == nfserr_replay_me) { op->replay = &cstate->replay_owner->so_replay; nfsd4_encode_replay(&resp->xdr, op); status = op->status = op->replay->rp_status; } else { nfsd4_encode_operation(resp, op); status = op->status; } dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", args->ops, args->opcnt, resp->opcnt, op->opnum, be32_to_cpu(status)); nfsd4_cstate_clear_replay(cstate); /* XXX Ugh, we need to get rid of this kind of special case: */ if (op->opnum == OP_READ && op->u.read.rd_filp) fput(op->u.read.rd_filp); nfsd4_increment_op_stats(op->opnum); } cstate->status = status; fh_put(current_fh); fh_put(save_fh); BUG_ON(cstate->replay_owner); out: /* Reset deferral mechanism for RPC deferrals */ rqstp->rq_usedeferral = true; dprintk("nfsv4 compound returned %d\n", ntohl(status)); return status; } #define op_encode_hdr_size (2) #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) #define op_encode_change_info_maxsz (5) #define nfs4_fattr_bitmap_maxsz (4) /* We'll fall back on returning no lockowner if run out of space: */ #define op_encode_lockowner_maxsz (0) #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ op_encode_ace_maxsz) #define op_encode_channel_attrs_maxsz (6 + 1 + 1) static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size) * sizeof(__be32); } static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); } static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); } static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + op_encode_change_info_maxsz + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); } /* * Note since this is an idempotent operation we won't insist on failing * the op prematurely if the estimate is too large. We may turn off splice * reads unnecessarily. */ static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { u32 *bmap = op->u.getattr.ga_bmval; u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; u32 ret = 0; if (bmap0 & FATTR4_WORD0_ACL) return svc_max_payload(rqstp); if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) return svc_max_payload(rqstp); if (bmap1 & FATTR4_WORD1_OWNER) { ret += IDMAP_NAMESZ + 4; bmap1 &= ~FATTR4_WORD1_OWNER; } if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { ret += IDMAP_NAMESZ + 4; bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; } if (bmap0 & FATTR4_WORD0_FILEHANDLE) { ret += NFS4_FHSIZE + 4; bmap0 &= ~FATTR4_WORD0_FILEHANDLE; } if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { ret += NFSD4_MAX_SEC_LABEL_LEN + 12; bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; } /* * Largest of remaining attributes are 16 bytes (e.g., * supported_attributes) */ ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); /* bitmask, length */ ret += 20; return ret; } static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + op_encode_change_info_maxsz) * sizeof(__be32); } static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + op_encode_lock_denied_maxsz) * sizeof(__be32); } static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + op_encode_stateid_maxsz + op_encode_change_info_maxsz + 1 + nfs4_fattr_bitmap_maxsz + op_encode_delegation_maxsz) * sizeof(__be32); } static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { u32 maxcount = 0, rlen = 0; maxcount = svc_max_payload(rqstp); rlen = min(op->u.read.rd_length, maxcount); return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); } static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { u32 maxcount = 0, rlen = 0; maxcount = svc_max_payload(rqstp); rlen = min(op->u.readdir.rd_maxcount, maxcount); return (op_encode_hdr_size + op_encode_verifier_maxsz + XDR_QUADLEN(rlen)) * sizeof(__be32); } static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + op_encode_change_info_maxsz) * sizeof(__be32); } static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + op_encode_change_info_maxsz + op_encode_change_info_maxsz) * sizeof(__be32); } static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return NFS4_MAX_SESSIONID_LEN + 20; } static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); } static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * sizeof(__be32); } static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); } static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1 + 1 + /* eir_flags, spr_how */\ 4 + /* spo_must_enforce & _allow with bitmap */\ 2 + /*eir_server_owner.so_minor_id */\ /* eir_server_owner.so_major_id<> */\ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ /* eir_server_scope<> */\ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1 + /* eir_server_impl_id array length */\ 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); } static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + \ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); } static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) { return (op_encode_hdr_size + \ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2 + /* csr_sequence, csr_flags */\ op_encode_channel_attrs_maxsz + \ op_encode_channel_attrs_maxsz) * sizeof(__be32); } static struct nfsd4_operation nfsd4_ops[] = { [OP_ACCESS] = { .op_func = (nfsd4op_func)nfsd4_access, .op_name = "OP_ACCESS", }, [OP_CLOSE] = { .op_func = (nfsd4op_func)nfsd4_close, .op_flags = OP_MODIFIES_SOMETHING, .op_name = "OP_CLOSE", .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, }, [OP_COMMIT] = { .op_func = (nfsd4op_func)nfsd4_commit, .op_flags = OP_MODIFIES_SOMETHING, .op_name = "OP_COMMIT", .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, }, [OP_CREATE] = { .op_func = (nfsd4op_func)nfsd4_create, .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, .op_name = "OP_CREATE", .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, }, [OP_DELEGRETURN] = { .op_func = (nfsd4op_func)nfsd4_delegreturn, .op_flags = OP_MODIFIES_SOMETHING, .op_name = "OP_DELEGRETURN", .op_rsize_bop = nfsd4_only_status_rsize, .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, }, [OP_GETATTR] = { .op_func = (nfsd4op_func)nfsd4_getattr, .op_flags = ALLOWED_ON_ABSENT_FS, .op_rsize_bop = nfsd4_getattr_rsize, .op_name = "OP_GETATTR", }, [OP_GETFH] = { .op_func = (nfsd4op_func)nfsd4_getfh, .op_name = "OP_GETFH", }, [OP_LINK] = { .op_func = (nfsd4op_func)nfsd4_link, .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING | OP_CACHEME, .op_name = "OP_LINK", .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, }, [OP_LOCK] = { .op_func = (nfsd4op_func)nfsd4_lock, .op_flags = OP_MODIFIES_SOMETHING, .op_name = "OP_LOCK", .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, }, [OP_LOCKT] = { .op_func = (nfsd4op_func)nfsd4_lockt, .op_name = "OP_LOCKT", }, [OP_LOCKU] = { .op_func = (nfsd4op_func)nfsd4_locku, .op_flags = OP_MODIFIES_SOMETHING, .op_name = "OP_LOCKU", .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, }, [OP_LOOKUP] = { .op_func = (nfsd4op_func)nfsd4_lookup, .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, .op_name = "OP_LOOKUP", }, [OP_LOOKUPP] = { .op_func = (nfsd4op_func)nfsd4_lookupp, .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, .op_name = "OP_LOOKUPP", }, [OP_NVERIFY] = { .op_func = (nfsd4op_func)nfsd4_nverify, .op_name = "OP_NVERIFY", }, [OP_OPEN] = { .op_func = (nfsd4op_func)nfsd4_open, .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, .op_name = "OP_OPEN", .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, }, [OP_OPEN_CONFIRM] = { .op_func = (nfsd4op_func)nfsd4_open_confirm, .op_flags = OP_MODIFIES_SOMETHING, .op_name = "OP_OPEN_CONFIRM", .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, }, [OP_OPEN_DOWNGRADE] = { .op_func = (nfsd4op_func)nfsd4_open_downgrade, .op_flags = OP_MODIFIES_SOMETHING, .op_name = "OP_OPEN_DOWNGRADE", .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, }, [OP_PUTFH] = { .op_func = (nfsd4op_func)nfsd4_putfh, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, .op_name = "OP_PUTFH", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_PUTPUBFH] = { .op_func = (nfsd4op_func)nfsd4_putrootfh, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, .op_name = "OP_PUTPUBFH", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_PUTROOTFH] = { .op_func = (nfsd4op_func)nfsd4_putrootfh, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, .op_name = "OP_PUTROOTFH", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_READ] = { .op_func = (nfsd4op_func)nfsd4_read, .op_name = "OP_READ", .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, }, [OP_READDIR] = { .op_func = (nfsd4op_func)nfsd4_readdir, .op_name = "OP_READDIR", .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, }, [OP_READLINK] = { .op_func = (nfsd4op_func)nfsd4_readlink, .op_name = "OP_READLINK", }, [OP_REMOVE] = { .op_func = (nfsd4op_func)nfsd4_remove, .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, .op_name = "OP_REMOVE", .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, }, [OP_RENAME] = { .op_func = (nfsd4op_func)nfsd4_rename, .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, .op_name = "OP_RENAME", .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, }, [OP_RENEW] = { .op_func = (nfsd4op_func)nfsd4_renew, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING, .op_name = "OP_RENEW", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_RESTOREFH] = { .op_func = (nfsd4op_func)nfsd4_restorefh, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, .op_name = "OP_RESTOREFH", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_SAVEFH] = { .op_func = (nfsd4op_func)nfsd4_savefh, .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, .op_name = "OP_SAVEFH", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_SECINFO] = { .op_func = (nfsd4op_func)nfsd4_secinfo, .op_flags = OP_HANDLES_WRONGSEC, .op_name = "OP_SECINFO", }, [OP_SETATTR] = { .op_func = (nfsd4op_func)nfsd4_setattr, .op_name = "OP_SETATTR", .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, }, [OP_SETCLIENTID] = { .op_func = (nfsd4op_func)nfsd4_setclientid, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING | OP_CACHEME, .op_name = "OP_SETCLIENTID", .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, }, [OP_SETCLIENTID_CONFIRM] = { .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING | OP_CACHEME, .op_name = "OP_SETCLIENTID_CONFIRM", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_VERIFY] = { .op_func = (nfsd4op_func)nfsd4_verify, .op_name = "OP_VERIFY", }, [OP_WRITE] = { .op_func = (nfsd4op_func)nfsd4_write, .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, .op_name = "OP_WRITE", .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, }, [OP_RELEASE_LOCKOWNER] = { .op_func = (nfsd4op_func)nfsd4_release_lockowner, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING, .op_name = "OP_RELEASE_LOCKOWNER", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, /* NFSv4.1 operations */ [OP_EXCHANGE_ID] = { .op_func = (nfsd4op_func)nfsd4_exchange_id, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP | OP_MODIFIES_SOMETHING, .op_name = "OP_EXCHANGE_ID", .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, }, [OP_BACKCHANNEL_CTL] = { .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, .op_name = "OP_BACKCHANNEL_CTL", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_BIND_CONN_TO_SESSION] = { .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP | OP_MODIFIES_SOMETHING, .op_name = "OP_BIND_CONN_TO_SESSION", .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, }, [OP_CREATE_SESSION] = { .op_func = (nfsd4op_func)nfsd4_create_session, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP | OP_MODIFIES_SOMETHING, .op_name = "OP_CREATE_SESSION", .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, }, [OP_DESTROY_SESSION] = { .op_func = (nfsd4op_func)nfsd4_destroy_session, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP | OP_MODIFIES_SOMETHING, .op_name = "OP_DESTROY_SESSION", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_SEQUENCE] = { .op_func = (nfsd4op_func)nfsd4_sequence, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, .op_name = "OP_SEQUENCE", }, [OP_DESTROY_CLIENTID] = { .op_func = (nfsd4op_func)nfsd4_destroy_clientid, .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP | OP_MODIFIES_SOMETHING, .op_name = "OP_DESTROY_CLIENTID", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_RECLAIM_COMPLETE] = { .op_func = (nfsd4op_func)nfsd4_reclaim_complete, .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, .op_name = "OP_RECLAIM_COMPLETE", .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, [OP_SECINFO_NO_NAME] = { .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, .op_flags = OP_HANDLES_WRONGSEC, .op_name = "OP_SECINFO_NO_NAME", }, [OP_TEST_STATEID] = { .op_func = (nfsd4op_func)nfsd4_test_stateid, .op_flags = ALLOWED_WITHOUT_FH, .op_name = "OP_TEST_STATEID", }, [OP_FREE_STATEID] = { .op_func = (nfsd4op_func)nfsd4_free_stateid, .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, .op_name = "OP_FREE_STATEID", .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, }, }; int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) { struct nfsd4_operation *opdesc; nfsd4op_rsize estimator; if (op->opnum == OP_ILLEGAL) return op_encode_hdr_size * sizeof(__be32); opdesc = OPDESC(op); estimator = opdesc->op_rsize_bop; return estimator ? estimator(rqstp, op) : PAGE_SIZE; } void warn_on_nonidempotent_op(struct nfsd4_op *op) { if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { pr_err("unable to encode reply to nonidempotent op %d (%s)\n", op->opnum, nfsd4_op_name(op->opnum)); WARN_ON_ONCE(1); } } static const char *nfsd4_op_name(unsigned opnum) { if (opnum < ARRAY_SIZE(nfsd4_ops)) return nfsd4_ops[opnum].op_name; return "unknown_operation"; } #define nfsd4_voidres nfsd4_voidargs struct nfsd4_voidargs { int dummy; }; static struct svc_procedure nfsd_procedures4[2] = { [NFSPROC4_NULL] = { .pc_func = (svc_procfunc) nfsd4_proc_null, .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, .pc_argsize = sizeof(struct nfsd4_voidargs), .pc_ressize = sizeof(struct nfsd4_voidres), .pc_cachetype = RC_NOCACHE, .pc_xdrressize = 1, }, [NFSPROC4_COMPOUND] = { .pc_func = (svc_procfunc) nfsd4_proc_compound, .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, .pc_argsize = sizeof(struct nfsd4_compoundargs), .pc_ressize = sizeof(struct nfsd4_compoundres), .pc_release = nfsd4_release_compoundargs, .pc_cachetype = RC_NOCACHE, .pc_xdrressize = NFSD_BUFSIZE/4, }, }; struct svc_version nfsd_version4 = { .vs_vers = 4, .vs_nproc = 2, .vs_proc = nfsd_procedures4, .vs_dispatch = nfsd_dispatch, .vs_xdrsize = NFS4_SVC_XDRSIZE, .vs_rpcb_optnl = 1, }; /* * Local variables: * c-basic-offset: 8 * End: */