| /* |
| * fs/nfsd/nfs4proc.c |
| * |
| * 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/param.h> |
| #include <linux/major.h> |
| #include <linux/slab.h> |
| #include <linux/file.h> |
| |
| #include <linux/sunrpc/svc.h> |
| #include <linux/nfsd/nfsd.h> |
| #include <linux/nfsd/cache.h> |
| #include <linux/nfs4.h> |
| #include <linux/nfsd/state.h> |
| #include <linux/nfsd/xdr4.h> |
| #include <linux/nfs4_acl.h> |
| #include <linux/sunrpc/gss_api.h> |
| |
| #define NFSDDBG_FACILITY NFSDDBG_PROC |
| |
| 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; |
| |
| 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_WRITE) |
| accmode |= NFSD_MAY_WRITE; |
| |
| status = fh_verify(rqstp, current_fh, S_IFREG, accmode); |
| |
| return status; |
| } |
| |
| static __be32 |
| do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| { |
| struct svc_fh resfh; |
| __be32 status; |
| int created = 0; |
| |
| fh_init(&resfh, NFS4_FHSIZE); |
| open->op_truncate = 0; |
| |
| if (open->op_create) { |
| /* |
| * Note: create modes (UNCHECKED,GUARDED...) are the same |
| * in NFSv4 as in v3. |
| */ |
| status = nfsd_create_v3(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, &created); |
| |
| /* If we ever decide to use different attrs to store the |
| * verifier in nfsd_create_v3, then we'll need to change this |
| */ |
| 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; |
| |
| set_change_info(&open->op_cinfo, current_fh); |
| |
| /* set reply cache */ |
| fh_dup2(current_fh, &resfh); |
| open->op_stateowner->so_replay.rp_openfh_len = resfh.fh_handle.fh_size; |
| memcpy(open->op_stateowner->so_replay.rp_openfh, |
| &resfh.fh_handle.fh_base, resfh.fh_handle.fh_size); |
| |
| if (!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; |
| |
| /* Only reclaims from previously confirmed clients are valid */ |
| if ((status = nfs4_check_open_reclaim(&open->op_clientid))) |
| return 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 */ |
| open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size; |
| memcpy(open->op_stateowner->so_replay.rp_openfh, |
| ¤t_fh->fh_handle.fh_base, |
| current_fh->fh_handle.fh_size); |
| |
| 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 __be32 |
| nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| struct nfsd4_open *open) |
| { |
| __be32 status; |
| dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", |
| (int)open->op_fname.len, open->op_fname.data, |
| open->op_stateowner); |
| |
| /* This check required by spec. */ |
| if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) |
| return nfserr_inval; |
| |
| nfs4_lock_state(); |
| |
| /* check seqid for replay. set nfs4_owner */ |
| status = nfsd4_process_open1(open); |
| if (status == nfserr_replay_me) { |
| struct nfs4_replay *rp = &open->op_stateowner->so_replay; |
| fh_put(&cstate->current_fh); |
| cstate->current_fh.fh_handle.fh_size = rp->rp_openfh_len; |
| memcpy(&cstate->current_fh.fh_handle.fh_base, rp->rp_openfh, |
| rp->rp_openfh_len); |
| 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; |
| |
| /* Openowner is now set, so sequence id will get bumped. Now we need |
| * these checks before we do any creates: */ |
| status = nfserr_grace; |
| if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
| goto out; |
| status = nfserr_no_grace; |
| if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
| goto out; |
| |
| switch (open->op_claim_type) { |
| case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
| status = nfserr_inval; |
| if (open->op_create) |
| goto out; |
| /* fall through */ |
| case NFS4_OPEN_CLAIM_NULL: |
| /* |
| * (1) set CURRENT_FH to the file being opened, |
| * creating it if necessary, (2) set open->op_cinfo, |
| * (3) set open->op_truncate if the file is to be |
| * truncated after opening, (4) do permission checking. |
| */ |
| status = do_open_lookup(rqstp, &cstate->current_fh, |
| open); |
| if (status) |
| goto out; |
| break; |
| case NFS4_OPEN_CLAIM_PREVIOUS: |
| open->op_stateowner->so_confirmed = 1; |
| /* |
| * The CURRENT_FH is already set to the file being |
| * opened. (1) set open->op_cinfo, (2) set |
| * open->op_truncate if the file is to be truncated |
| * after opening, (3) do permission checking. |
| */ |
| status = do_open_fhandle(rqstp, &cstate->current_fh, |
| open); |
| if (status) |
| goto out; |
| break; |
| case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
| open->op_stateowner->so_confirmed = 1; |
| 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); |
| out: |
| if (open->op_stateowner) { |
| nfs4_get_stateowner(open->op_stateowner); |
| cstate->replay_owner = open->op_stateowner; |
| } |
| 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_NOP); |
| } |
| |
| 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) |
| { |
| __be32 status; |
| |
| u32 *p = (u32 *)commit->co_verf.data; |
| *p++ = nfssvc_boot.tv_sec; |
| *p++ = nfssvc_boot.tv_usec; |
| |
| status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, |
| commit->co_count); |
| if (status == nfserr_symlink) |
| status = nfserr_inval; |
| return status; |
| } |
| |
| 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 == nfserr_symlink) |
| status = nfserr_notdir; |
| 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) { |
| fh_unlock(&cstate->current_fh); |
| set_change_info(&create->cr_cinfo, &cstate->current_fh); |
| fh_dup2(&cstate->current_fh, &resfh); |
| } |
| |
| 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_SUPPORTED_ATTRS_WORD0; |
| getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; |
| |
| 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_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| void *arg) |
| { |
| 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 == cstate->current_fh.fh_dentry) { |
| fh_put(&tmp_fh); |
| return nfserr_noent; |
| } |
| fh_put(&tmp_fh); |
| return nfsd_lookup(rqstp, &cstate->current_fh, |
| "..", 2, &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->current_fh, |
| &read->rd_stateid, |
| CHECK_FH | 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_SUPPORTED_ATTRS_WORD0; |
| readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1; |
| |
| if ((cookie > ~(u32)0) || (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 (nfs4_in_grace()) |
| return nfserr_grace; |
| status = nfsd_unlink(rqstp, &cstate->current_fh, 0, |
| remove->rm_name, remove->rm_namelen); |
| if (status == nfserr_symlink) |
| return nfserr_notdir; |
| 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 (nfs4_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; |
| else if (status == nfserr_symlink) |
| status = nfserr_notdir; |
| |
| 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 = 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); |
| return err; |
| } |
| |
| 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->current_fh, |
| &setattr->sa_stateid, CHECK_FH | WR_STATE, NULL); |
| nfs4_unlock_state(); |
| if (status) { |
| dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); |
| return status; |
| } |
| } |
| status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); |
| if (status) |
| return status; |
| status = nfs_ok; |
| 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: |
| mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); |
| 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; |
| |
| /* 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->current_fh, stateid, |
| CHECK_FH | WR_STATE, &filp); |
| if (filp) |
| get_file(filp); |
| nfs4_unlock_state(); |
| |
| if (status) { |
| dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); |
| return status; |
| } |
| |
| write->wr_bytes_written = 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, |
| write->wr_buflen, &write->wr_how_written); |
| if (filp) |
| fput(filp); |
| |
| if (status == nfserr_symlink) |
| status = nfserr_inval; |
| 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; |
| |
| if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) |
| || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1)) |
| return nfserr_attrnotsupp; |
| 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_resource; |
| |
| 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; |
| |
| p = buf + 3; |
| 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]++; |
| } |
| |
| static void cstate_free(struct nfsd4_compound_state *cstate) |
| { |
| if (cstate == NULL) |
| return; |
| fh_put(&cstate->current_fh); |
| fh_put(&cstate->save_fh); |
| BUG_ON(cstate->replay_owner); |
| kfree(cstate); |
| } |
| |
| static struct nfsd4_compound_state *cstate_alloc(void) |
| { |
| struct nfsd4_compound_state *cstate; |
| |
| cstate = kmalloc(sizeof(struct nfsd4_compound_state), GFP_KERNEL); |
| if (cstate == NULL) |
| return NULL; |
| fh_init(&cstate->current_fh, NFS4_FHSIZE); |
| fh_init(&cstate->save_fh, NFS4_FHSIZE); |
| cstate->replay_owner = NULL; |
| return cstate; |
| } |
| |
| typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, |
| void *); |
| |
| struct nfsd4_operation { |
| nfsd4op_func op_func; |
| u32 op_flags; |
| /* Most ops require a valid current filehandle; a few don't: */ |
| #define ALLOWED_WITHOUT_FH 1 |
| /* GETATTR and ops not listed as returning NFS4ERR_MOVED: */ |
| #define ALLOWED_ON_ABSENT_FS 2 |
| char *op_name; |
| }; |
| |
| static struct nfsd4_operation nfsd4_ops[]; |
| |
| static inline char *nfsd4_op_name(unsigned opnum); |
| |
| /* |
| * 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 = NULL; |
| int slack_bytes; |
| __be32 status; |
| |
| status = nfserr_resource; |
| cstate = cstate_alloc(); |
| if (cstate == NULL) |
| goto out; |
| |
| 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; |
| |
| /* |
| * According to RFC3010, this takes precedence over all other errors. |
| */ |
| status = nfserr_minor_vers_mismatch; |
| if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION) |
| goto out; |
| |
| status = nfs_ok; |
| 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 = &nfsd4_ops[op->opnum]; |
| |
| 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 (opdesc->op_func) |
| op->status = opdesc->op_func(rqstp, cstate, &op->u); |
| else |
| BUG_ON(op->status == nfs_ok); |
| |
| encode_op: |
| 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; |
| } |
| if (cstate->replay_owner) { |
| nfs4_put_stateowner(cstate->replay_owner); |
| 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); |
| } |
| |
| out: |
| nfsd4_release_compoundargs(args); |
| cstate_free(cstate); |
| dprintk("nfsv4 compound returned %d\n", ntohl(status)); |
| return status; |
| } |
| |
| static struct nfsd4_operation nfsd4_ops[OP_RELEASE_LOCKOWNER+1] = { |
| [OP_ACCESS] = { |
| .op_func = (nfsd4op_func)nfsd4_access, |
| .op_name = "OP_ACCESS", |
| }, |
| [OP_CLOSE] = { |
| .op_func = (nfsd4op_func)nfsd4_close, |
| .op_name = "OP_CLOSE", |
| }, |
| [OP_COMMIT] = { |
| .op_func = (nfsd4op_func)nfsd4_commit, |
| .op_name = "OP_COMMIT", |
| }, |
| [OP_CREATE] = { |
| .op_func = (nfsd4op_func)nfsd4_create, |
| .op_name = "OP_CREATE", |
| }, |
| [OP_DELEGRETURN] = { |
| .op_func = (nfsd4op_func)nfsd4_delegreturn, |
| .op_name = "OP_DELEGRETURN", |
| }, |
| [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_name = "OP_LINK", |
| }, |
| [OP_LOCK] = { |
| .op_func = (nfsd4op_func)nfsd4_lock, |
| .op_name = "OP_LOCK", |
| }, |
| [OP_LOCKT] = { |
| .op_func = (nfsd4op_func)nfsd4_lockt, |
| .op_name = "OP_LOCKT", |
| }, |
| [OP_LOCKU] = { |
| .op_func = (nfsd4op_func)nfsd4_locku, |
| .op_name = "OP_LOCKU", |
| }, |
| [OP_LOOKUP] = { |
| .op_func = (nfsd4op_func)nfsd4_lookup, |
| .op_name = "OP_LOOKUP", |
| }, |
| [OP_LOOKUPP] = { |
| .op_func = (nfsd4op_func)nfsd4_lookupp, |
| .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_name = "OP_OPEN", |
| }, |
| [OP_OPEN_CONFIRM] = { |
| .op_func = (nfsd4op_func)nfsd4_open_confirm, |
| .op_name = "OP_OPEN_CONFIRM", |
| }, |
| [OP_OPEN_DOWNGRADE] = { |
| .op_func = (nfsd4op_func)nfsd4_open_downgrade, |
| .op_name = "OP_OPEN_DOWNGRADE", |
| }, |
| [OP_PUTFH] = { |
| .op_func = (nfsd4op_func)nfsd4_putfh, |
| .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
| .op_name = "OP_PUTFH", |
| }, |
| [OP_PUTPUBFH] = { |
| /* unsupported, just for future reference: */ |
| .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
| .op_name = "OP_PUTPUBFH", |
| }, |
| [OP_PUTROOTFH] = { |
| .op_func = (nfsd4op_func)nfsd4_putrootfh, |
| .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
| .op_name = "OP_PUTROOTFH", |
| }, |
| [OP_READ] = { |
| .op_func = (nfsd4op_func)nfsd4_read, |
| .op_name = "OP_READ", |
| }, |
| [OP_READDIR] = { |
| .op_func = (nfsd4op_func)nfsd4_readdir, |
| .op_name = "OP_READDIR", |
| }, |
| [OP_READLINK] = { |
| .op_func = (nfsd4op_func)nfsd4_readlink, |
| .op_name = "OP_READLINK", |
| }, |
| [OP_REMOVE] = { |
| .op_func = (nfsd4op_func)nfsd4_remove, |
| .op_name = "OP_REMOVE", |
| }, |
| [OP_RENAME] = { |
| .op_name = "OP_RENAME", |
| .op_func = (nfsd4op_func)nfsd4_rename, |
| }, |
| [OP_RENEW] = { |
| .op_func = (nfsd4op_func)nfsd4_renew, |
| .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
| .op_name = "OP_RENEW", |
| }, |
| [OP_RESTOREFH] = { |
| .op_func = (nfsd4op_func)nfsd4_restorefh, |
| .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
| .op_name = "OP_RESTOREFH", |
| }, |
| [OP_SAVEFH] = { |
| .op_func = (nfsd4op_func)nfsd4_savefh, |
| .op_name = "OP_SAVEFH", |
| }, |
| [OP_SECINFO] = { |
| .op_func = (nfsd4op_func)nfsd4_secinfo, |
| .op_name = "OP_SECINFO", |
| }, |
| [OP_SETATTR] = { |
| .op_func = (nfsd4op_func)nfsd4_setattr, |
| .op_name = "OP_SETATTR", |
| }, |
| [OP_SETCLIENTID] = { |
| .op_func = (nfsd4op_func)nfsd4_setclientid, |
| .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
| .op_name = "OP_SETCLIENTID", |
| }, |
| [OP_SETCLIENTID_CONFIRM] = { |
| .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, |
| .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
| .op_name = "OP_SETCLIENTID_CONFIRM", |
| }, |
| [OP_VERIFY] = { |
| .op_func = (nfsd4op_func)nfsd4_verify, |
| .op_name = "OP_VERIFY", |
| }, |
| [OP_WRITE] = { |
| .op_func = (nfsd4op_func)nfsd4_write, |
| .op_name = "OP_WRITE", |
| }, |
| [OP_RELEASE_LOCKOWNER] = { |
| .op_func = (nfsd4op_func)nfsd4_release_lockowner, |
| .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, |
| .op_name = "OP_RELEASE_LOCKOWNER", |
| }, |
| }; |
| |
| static inline char * |
| nfsd4_op_name(unsigned opnum) |
| { |
| if (opnum < ARRAY_SIZE(nfsd4_ops)) |
| return nfsd4_ops[opnum].op_name; |
| return "unknown_operation"; |
| } |
| |
| #define nfs4svc_decode_voidargs NULL |
| #define nfs4svc_release_void NULL |
| #define nfsd4_voidres nfsd4_voidargs |
| #define nfs4svc_release_compound NULL |
| struct nfsd4_voidargs { int dummy; }; |
| |
| #define PROC(name, argt, rest, relt, cache, respsize) \ |
| { (svc_procfunc) nfsd4_proc_##name, \ |
| (kxdrproc_t) nfs4svc_decode_##argt##args, \ |
| (kxdrproc_t) nfs4svc_encode_##rest##res, \ |
| (kxdrproc_t) nfs4svc_release_##relt, \ |
| sizeof(struct nfsd4_##argt##args), \ |
| sizeof(struct nfsd4_##rest##res), \ |
| 0, \ |
| cache, \ |
| respsize, \ |
| } |
| |
| /* |
| * TODO: At the present time, the NFSv4 server does not do XID caching |
| * of requests. Implementing XID caching would not be a serious problem, |
| * although it would require a mild change in interfaces since one |
| * doesn't know whether an NFSv4 request is idempotent until after the |
| * XDR decode. However, XID caching totally confuses pynfs (Peter |
| * Astrand's regression testsuite for NFSv4 servers), which reuses |
| * XID's liberally, so I've left it unimplemented until pynfs generates |
| * better XID's. |
| */ |
| static struct svc_procedure nfsd_procedures4[2] = { |
| PROC(null, void, void, void, RC_NOCACHE, 1), |
| PROC(compound, compound, compound, compound, RC_NOCACHE, 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: |
| */ |