| /* |
| * Server-side procedures for NFSv4. |
| * |
| * Copyright (c) 2002 The Regents of the University of Michigan. |
| * All rights reserved. |
| * |
| * Kendrick Smith <kmsmith@umich.edu> |
| * Andy Adamson <andros@umich.edu> |
| * |
| * 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 <linux/file.h> |
| #include <linux/slab.h> |
| |
| #include "idmap.h" |
| #include "cache.h" |
| #include "xdr4.h" |
| #include "vfs.h" |
| #include "current_stateid.h" |
| |
| #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) |
| cache_get(&src->fh_export->h); |
| *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 __be32 |
| do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| { |
| struct svc_fh resfh; |
| __be32 status; |
| |
| 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); |
| |
| /* |
| * 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 { |
| status = nfsd_lookup(rqstp, current_fh, |
| open->op_fname.data, open->op_fname.len, &resfh); |
| fh_unlock(current_fh); |
| 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); |
| |
| set_change_info(&open->op_cinfo, current_fh); |
| fh_dup2(current_fh, &resfh); |
| |
| /* set reply cache */ |
| fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, |
| &resfh.fh_handle); |
| if (!open->op_created) |
| status = do_open_permission(rqstp, current_fh, open, |
| NFSD_MAY_NOP); |
| |
| out: |
| fh_put(&resfh); |
| return status; |
| } |
| |
| static __be32 |
| do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| { |
| __be32 status; |
| |
| /* 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)); |
| |
| /* set replay cache */ |
| fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, |
| ¤t_fh->fh_handle); |
| |
| open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && |
| (open->op_iattr.ia_size == 0); |
| |
| status = do_open_permission(rqstp, current_fh, open, |
| NFSD_MAY_OWNER_OVERRIDE); |
| |
| 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 nfsd4_compoundres *resp; |
| |
| 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; |
| |
| /* We don't yet support WANT bits: */ |
| open->op_share_access &= NFS4_SHARE_ACCESS_MASK; |
| |
| open->op_created = 0; |
| /* |
| * RFC5661 18.51.3 |
| * Before RECLAIM_COMPLETE done, server should deny new lock |
| */ |
| if (nfsd4_has_session(cstate) && |
| !cstate->session->se_client->cl_firststate && |
| open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
| return nfserr_grace; |
| |
| if (nfsd4_has_session(cstate)) |
| copy_clientid(&open->op_clientid, cstate->session); |
| |
| nfs4_lock_state(); |
| |
| /* check seqid for replay. set nfs4_owner */ |
| resp = rqstp->rq_resp; |
| status = nfsd4_process_open1(&resp->cstate, open); |
| 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; |
| |
| 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() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
| goto out; |
| status = nfserr_no_grace; |
| if (!locks_in_grace() && 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->current_fh, |
| open); |
| if (status) |
| goto out; |
| break; |
| case NFS4_OPEN_CLAIM_PREVIOUS: |
| open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
| status = nfs4_check_open_reclaim(&open->op_clientid); |
| if (status) |
| goto out; |
| case NFS4_OPEN_CLAIM_FH: |
| case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
| status = do_open_fhandle(rqstp, &cstate->current_fh, |
| open); |
| if (status) |
| goto out; |
| break; |
| case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
| case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
| open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
| 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, &cstate->current_fh, open); |
| WARN_ON(status && open->op_created); |
| out: |
| nfsd4_cleanup_open_state(open, status); |
| if (open->op_openowner) |
| cstate->replay_owner = &open->op_openowner->oo_owner; |
| else |
| nfs4_unlock_state(); |
| return status; |
| } |
| |
| /* |
| * 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); |
| 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); |
| 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 __be32 |
| nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| struct nfsd4_commit *commit) |
| { |
| u32 *p = (u32 *)commit->co_verf.data; |
| *p++ = nfssvc_boot.tv_sec; |
| *p++ = nfssvc_boot.tv_usec; |
| |
| 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: |
| /* ugh! we have to null-terminate the linktext, or |
| * vfs_symlink() will choke. it is always safe to |
| * null-terminate by brute force, since at worst we |
| * will overwrite the first byte of the create namelen |
| * in the XDR buffer, which has already been extracted |
| * during XDR decode. |
| */ |
| create->cr_linkname[create->cr_linklen] = 0; |
| |
| status = nfsd_symlink(rqstp, &cstate->current_fh, |
| create->cr_name, create->cr_namelen, |
| create->cr_linkname, create->cr_linklen, |
| &resfh, &create->cr_iattr); |
| 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_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; |
| |
| nfs4_lock_state(); |
| /* check stateid */ |
| if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, |
| RD_STATE, &read->rd_filp))) { |
| dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); |
| goto out; |
| } |
| if (read->rd_filp) |
| get_file(read->rd_filp); |
| status = nfs_ok; |
| out: |
| nfs4_unlock_state(); |
| 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()) |
| 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() && !(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); |
| |
| /* the underlying filesystem returns different error's than required |
| * by NFSv4. both save_fh and current_fh have been verified.. */ |
| if (status == nfserr_isdir) |
| status = nfserr_exist; |
| else if ((status == nfserr_notdir) && |
| (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && |
| S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) |
| status = nfserr_exist; |
| |
| if (!status) { |
| set_change_info(&rename->rn_sinfo, &cstate->current_fh); |
| set_change_info(&rename->rn_tinfo, &cstate->save_fh); |
| } |
| return status; |
| } |
| |
| 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; |
| } |
| exp_get(cstate->current_fh.fh_export); |
| sin->sin_exp = 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; |
| |
| if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { |
| nfs4_lock_state(); |
| status = nfs4_preprocess_stateid_op(cstate, |
| &setattr->sa_stateid, WR_STATE, NULL); |
| nfs4_unlock_state(); |
| if (status) { |
| dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); |
| return status; |
| } |
| } |
| status = fh_want_write(&cstate->current_fh); |
| if (status) |
| return status; |
| 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; |
| status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, |
| 0, (time_t)0); |
| out: |
| fh_drop_write(&cstate->current_fh); |
| return status; |
| } |
| |
| 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; |
| u32 *p; |
| __be32 status = nfs_ok; |
| unsigned long cnt; |
| |
| /* no need to check permission - this will be done in nfsd_write() */ |
| |
| if (write->wr_offset >= OFFSET_MAX) |
| return nfserr_inval; |
| |
| nfs4_lock_state(); |
| status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); |
| if (filp) |
| get_file(filp); |
| nfs4_unlock_state(); |
| |
| 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; |
| p = (u32 *)write->wr_verifier.data; |
| *p++ = nfssvc_boot.tv_sec; |
| *p++ = nfssvc_boot.tv_usec; |
| |
| status = nfsd_write(rqstp, &cstate->current_fh, filp, |
| write->wr_offset, rqstp->rq_vec, write->wr_vlen, |
| &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; |
| |
| status = nfsd4_encode_fattr(&cstate->current_fh, |
| cstate->current_fh.fh_export, |
| cstate->current_fh.fh_dentry, buf, |
| &count, verify->ve_bmval, |
| rqstp, 0); |
| |
| /* this means that nfsd4_encode_fattr() ran out of space */ |
| if (status == nfserr_resource && count == 0) |
| 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_setter op_get_currentstateid; |
| stateid_getter 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) |
| { |
| 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); |
| } |
| |
| /* |
| * 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; |
| int slack_bytes; |
| u32 plen = 0; |
| __be32 status; |
| |
| resp->xbuf = &rqstp->rq_res; |
| resp->p = rqstp->rq_res.head[0].iov_base + |
| rqstp->rq_res.head[0].iov_len; |
| resp->tagp = resp->p; |
| /* reserve space for: taglen, tag, and opcnt */ |
| resp->p += 2 + XDR_QUADLEN(args->taglen); |
| resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; |
| resp->taglen = args->taglen; |
| resp->tag = args->tag; |
| resp->opcnt = 0; |
| resp->rqstp = rqstp; |
| resp->cstate.minorversion = args->minorversion; |
| resp->cstate.replay_owner = NULL; |
| resp->cstate.session = NULL; |
| fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); |
| fh_init(&resp->cstate.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 = 0; |
| |
| /* |
| * According to RFC3010, this takes precedence over all other errors. |
| */ |
| status = nfserr_minor_vers_mismatch; |
| if (args->minorversion > nfsd_supported_minorversion) |
| 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) |
| goto encode_op; |
| |
| /* We must be able to encode a successful response to |
| * this operation, with enough room left over to encode a |
| * failed response to the next operation. If we don't |
| * have enough room, fail with ERR_RESOURCE. |
| */ |
| slack_bytes = (char *)resp->end - (char *)resp->p; |
| if (slack_bytes < COMPOUND_SLACK_SPACE |
| + COMPOUND_ERR_SLACK_SPACE) { |
| BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); |
| op->status = nfserr_resource; |
| goto encode_op; |
| } |
| |
| opdesc = OPDESC(op); |
| |
| if (!cstate->current_fh.fh_dentry) { |
| if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { |
| op->status = nfserr_nofilehandle; |
| goto encode_op; |
| } |
| } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && |
| !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { |
| op->status = nfserr_moved; |
| goto encode_op; |
| } |
| |
| /* If op is non-idempotent */ |
| if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { |
| plen = opdesc->op_rsize_bop(rqstp, op); |
| op->status = nfsd4_check_resp_size(resp, plen); |
| } |
| |
| if (op->status) |
| goto encode_op; |
| |
| if (opdesc->op_func) { |
| if (opdesc->op_get_currentstateid) |
| opdesc->op_get_currentstateid(cstate, &op->u); |
| op->status = opdesc->op_func(rqstp, cstate, &op->u); |
| } else |
| BUG_ON(op->status == nfs_ok); |
| |
| if (!op->status) { |
| if (opdesc->op_set_currentstateid) |
| opdesc->op_set_currentstateid(cstate, &op->u); |
| |
| if (opdesc->op_flags & OP_CLEAR_STATEID) |
| cstate->current_stateid = NULL; |
| |
| if (need_wrongsec_check(rqstp)) |
| op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp); |
| } |
| |
| encode_op: |
| /* Only from SEQUENCE */ |
| if (resp->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, 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)); |
| |
| if (cstate->replay_owner) { |
| nfs4_unlock_state(); |
| cstate->replay_owner = NULL; |
| } |
| /* 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); |
| } |
| |
| resp->cstate.status = status; |
| fh_put(&resp->cstate.current_fh); |
| fh_put(&resp->cstate.save_fh); |
| BUG_ON(resp->cstate.replay_owner); |
| out: |
| /* Reset deferral mechanism for RPC deferrals */ |
| rqstp->rq_usedeferral = 1; |
| 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) |
| |
| #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) |
| #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); |
| } |
| |
| 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 = op->u.read.rd_length; |
| |
| if (rlen > maxcount) |
| rlen = maxcount; |
| |
| return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen; |
| } |
| |
| static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| u32 rlen = op->u.readdir.rd_maxcount; |
| |
| if (rlen > PAGE_SIZE) |
| rlen = PAGE_SIZE; |
| |
| return (op_encode_hdr_size + op_encode_verifier_maxsz) |
| * sizeof(__be32) + rlen; |
| } |
| |
| 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_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 + 1024) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + 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 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\ |
| 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_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_GETATTR] = { |
| .op_func = (nfsd4op_func)nfsd4_getattr, |
| .op_flags = ALLOWED_ON_ABSENT_FS, |
| .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_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_LOOKUP] = { |
| .op_func = (nfsd4op_func)nfsd4_lookup, |
| .op_flags = OP_HANDLES_WRONGSEC, |
| .op_name = "OP_LOOKUP", |
| }, |
| [OP_LOOKUPP] = { |
| .op_func = (nfsd4op_func)nfsd4_lookupp, |
| .op_flags = OP_HANDLES_WRONGSEC, |
| .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_PUTFH] = { |
| .op_func = (nfsd4op_func)nfsd4_putfh, |
| .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS |
| | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, |
| .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_MODIFIES_SOMETHING, |
| .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_MODIFIES_SOMETHING, |
| .op_name = "OP_PUTROOTFH", |
| .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| }, |
| [OP_READ] = { |
| .op_func = (nfsd4op_func)nfsd4_read, |
| .op_flags = OP_MODIFIES_SOMETHING, |
| .op_name = "OP_READ", |
| .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, |
| }, |
| [OP_READDIR] = { |
| .op_func = (nfsd4op_func)nfsd4_readdir, |
| .op_flags = OP_MODIFIES_SOMETHING, |
| .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_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_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_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_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, |
| }, |
| }; |
| |
| 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, |
| }; |
| |
| /* |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |