diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfsd/nfs4proc.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfsd/nfs4proc.c | 1769 |
1 files changed, 1769 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/fs/nfsd/nfs4proc.c b/ANDROID_3.4.5/fs/nfsd/nfs4proc.c new file mode 100644 index 00000000..987e719f --- /dev/null +++ b/ANDROID_3.4.5/fs/nfsd/nfs4proc.c @@ -0,0 +1,1769 @@ +/* + * 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; + + 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); + + /* + * 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 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, resfh, open, + NFSD_MAY_NOP); + set_change_info(&open->op_cinfo, current_fh); + fh_dup2(current_fh, resfh); +out: + fh_put(resfh); + kfree(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; + + 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); + + 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); + 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) +{ + __be32 verf[2]; + + verf[0] = (__be32)nfssvc_boot.tv_sec; + verf[1] = (__be32)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); + 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; + int err; + + 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; + } + } + 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; + 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; + __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; + gen_boot_verifier(&write->wr_verifier); + + 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[]; + +#ifdef NFSD_DEBUG +static const char *nfsd4_op_name(unsigned opnum); +#endif + +/* + * 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) + clear_current_stateid(cstate); + + 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_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_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_MODIFIES_SOMETHING + | 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_MODIFIES_SOMETHING + | 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_MODIFIES_SOMETHING + | 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_flags = OP_MODIFIES_SOMETHING, + .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_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_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_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, + }, +}; + +#ifdef NFSD_DEBUG +static const char *nfsd4_op_name(unsigned opnum) +{ + if (opnum < ARRAY_SIZE(nfsd4_ops)) + return nfsd4_ops[opnum].op_name; + return "unknown_operation"; +} +#endif + +#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: + */ |