| /* |
| * 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/fs_struct.h> |
| #include <linux/file.h> |
| #include <linux/falloc.h> |
| #include <linux/slab.h> |
| #include <linux/kthread.h> |
| #include <linux/sunrpc/addr.h> |
| #include <linux/nfs_ssc.h> |
| |
| #include "idmap.h" |
| #include "cache.h" |
| #include "xdr4.h" |
| #include "vfs.h" |
| #include "current_stateid.h" |
| #include "netns.h" |
| #include "acl.h" |
| #include "pnfs.h" |
| #include "trace.h" |
| |
| static bool inter_copy_offload_enable; |
| module_param(inter_copy_offload_enable, bool, 0644); |
| MODULE_PARM_DESC(inter_copy_offload_enable, |
| "Enable inter server to server copy offload. Default: false"); |
| |
| #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
| static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */ |
| module_param(nfsd4_ssc_umount_timeout, int, 0644); |
| MODULE_PARM_DESC(nfsd4_ssc_umount_timeout, |
| "idle msecs before unmount export from source server"); |
| #endif |
| |
| #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
| #include <linux/security.h> |
| |
| static inline void |
| nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) |
| { |
| struct inode *inode = d_inode(resfh->fh_dentry); |
| int status; |
| |
| inode_lock(inode); |
| status = security_inode_setsecctx(resfh->fh_dentry, |
| label->data, label->len); |
| inode_unlock(inode); |
| |
| if (status) |
| /* |
| * XXX: We should really fail the whole open, but we may |
| * already have created a new file, so it may be too |
| * late. For now this seems the least of evils: |
| */ |
| bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; |
| |
| return; |
| } |
| #else |
| static inline void |
| nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) |
| { } |
| #endif |
| |
| #define NFSDDBG_FACILITY NFSDDBG_PROC |
| |
| static u32 nfsd_attrmask[] = { |
| NFSD_WRITEABLE_ATTRS_WORD0, |
| NFSD_WRITEABLE_ATTRS_WORD1, |
| NFSD_WRITEABLE_ATTRS_WORD2 |
| }; |
| |
| static u32 nfsd41_ex_attrmask[] = { |
| NFSD_SUPPATTR_EXCLCREAT_WORD0, |
| NFSD_SUPPATTR_EXCLCREAT_WORD1, |
| NFSD_SUPPATTR_EXCLCREAT_WORD2 |
| }; |
| |
| static __be32 |
| check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| u32 *bmval, u32 *writable) |
| { |
| struct dentry *dentry = cstate->current_fh.fh_dentry; |
| struct svc_export *exp = cstate->current_fh.fh_export; |
| |
| if (!nfsd_attrs_supported(cstate->minorversion, bmval)) |
| return nfserr_attrnotsupp; |
| if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry))) |
| return nfserr_attrnotsupp; |
| if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) && |
| !(exp->ex_flags & NFSEXP_SECURITY_LABEL)) |
| return nfserr_attrnotsupp; |
| if (writable && !bmval_is_subset(bmval, writable)) |
| return nfserr_inval; |
| if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) && |
| (bmval[1] & FATTR4_WORD1_MODE)) |
| return nfserr_inval; |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_check_open_attributes(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, struct nfsd4_open *open) |
| { |
| __be32 status = nfs_ok; |
| |
| if (open->op_create == NFS4_OPEN_CREATE) { |
| if (open->op_createmode == NFS4_CREATE_UNCHECKED |
| || open->op_createmode == NFS4_CREATE_GUARDED) |
| status = check_attr_support(rqstp, cstate, |
| open->op_bmval, nfsd_attrmask); |
| else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) |
| status = check_attr_support(rqstp, cstate, |
| open->op_bmval, nfsd41_ex_attrmask); |
| } |
| |
| return status; |
| } |
| |
| static int |
| is_create_with_attrs(struct nfsd4_open *open) |
| { |
| return open->op_create == NFS4_OPEN_CREATE |
| && (open->op_createmode == NFS4_CREATE_UNCHECKED |
| || open->op_createmode == NFS4_CREATE_GUARDED |
| || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); |
| } |
| |
| /* |
| * if error occurs when setting the acl, just clear the acl bit |
| * in the returned attr bitmap. |
| */ |
| static void |
| do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| struct nfs4_acl *acl, u32 *bmval) |
| { |
| __be32 status; |
| |
| status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); |
| if (status) |
| /* |
| * We should probably fail the whole open at this point, |
| * but we've already created the file, so it's too late; |
| * So this seems the least of evils: |
| */ |
| bmval[0] &= ~FATTR4_WORD0_ACL; |
| } |
| |
| static inline void |
| fh_dup2(struct svc_fh *dst, struct svc_fh *src) |
| { |
| fh_put(dst); |
| dget(src->fh_dentry); |
| if (src->fh_export) |
| exp_get(src->fh_export); |
| *dst = *src; |
| } |
| |
| static __be32 |
| do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) |
| { |
| __be32 status; |
| |
| if (open->op_truncate && |
| !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
| return nfserr_inval; |
| |
| accmode |= NFSD_MAY_READ_IF_EXEC; |
| |
| if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
| accmode |= NFSD_MAY_READ; |
| if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); |
| if (open->op_share_deny & NFS4_SHARE_DENY_READ) |
| accmode |= NFSD_MAY_WRITE; |
| |
| status = fh_verify(rqstp, current_fh, S_IFREG, accmode); |
| |
| return status; |
| } |
| |
| static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) |
| { |
| umode_t mode = d_inode(fh->fh_dentry)->i_mode; |
| |
| if (S_ISREG(mode)) |
| return nfs_ok; |
| if (S_ISDIR(mode)) |
| return nfserr_isdir; |
| /* |
| * Using err_symlink as our catch-all case may look odd; but |
| * there's no other obvious error for this case in 4.0, and we |
| * happen to know that it will cause the linux v4 client to do |
| * the right thing on attempts to open something other than a |
| * regular file. |
| */ |
| return nfserr_symlink; |
| } |
| |
| static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) |
| { |
| if (nfsd4_has_session(cstate)) |
| return; |
| fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, |
| &resfh->fh_handle); |
| } |
| |
| static __be32 |
| do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) |
| { |
| struct svc_fh *current_fh = &cstate->current_fh; |
| int accmode; |
| __be32 status; |
| |
| *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); |
| if (!*resfh) |
| return nfserr_jukebox; |
| fh_init(*resfh, NFS4_FHSIZE); |
| open->op_truncate = false; |
| |
| 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. |
| */ |
| current->fs->umask = open->op_umask; |
| status = do_nfsd_create(rqstp, current_fh, open->op_fname, |
| open->op_fnamelen, &open->op_iattr, |
| *resfh, open->op_createmode, |
| (u32 *)open->op_verf.data, |
| &open->op_truncate, &open->op_created); |
| current->fs->umask = 0; |
| |
| if (!status && open->op_label.len) |
| nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); |
| |
| /* |
| * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 |
| * use the returned bitmask to indicate which attributes |
| * we used to store the verifier: |
| */ |
| if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) |
| open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | |
| FATTR4_WORD1_TIME_MODIFY); |
| } else |
| /* |
| * Note this may exit with the parent still locked. |
| * We will hold the lock until nfsd4_open's final |
| * lookup, to prevent renames or unlinks until we've had |
| * a chance to an acquire a delegation if appropriate. |
| */ |
| status = nfsd_lookup(rqstp, current_fh, |
| open->op_fname, open->op_fnamelen, *resfh); |
| if (status) |
| goto out; |
| status = nfsd_check_obj_isreg(*resfh); |
| if (status) |
| goto out; |
| |
| if (is_create_with_attrs(open) && open->op_acl != NULL) |
| do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); |
| |
| nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); |
| accmode = NFSD_MAY_NOP; |
| if (open->op_created || |
| open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| accmode |= NFSD_MAY_OWNER_OVERRIDE; |
| status = do_open_permission(rqstp, *resfh, open, accmode); |
| set_change_info(&open->op_cinfo, current_fh); |
| out: |
| return status; |
| } |
| |
| static __be32 |
| do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) |
| { |
| struct svc_fh *current_fh = &cstate->current_fh; |
| __be32 status; |
| int accmode = 0; |
| |
| /* We don't know the target directory, and therefore can not |
| * set the change info |
| */ |
| |
| memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); |
| |
| nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); |
| |
| open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && |
| (open->op_iattr.ia_size == 0); |
| /* |
| * In the delegation case, the client is telling us about an |
| * open that it *already* performed locally, some time ago. We |
| * should let it succeed now if possible. |
| * |
| * In the case of a CLAIM_FH open, on the other hand, the client |
| * may be counting on us to enforce permissions (the Linux 4.1 |
| * client uses this for normal opens, for example). |
| */ |
| if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) |
| accmode = NFSD_MAY_OWNER_OVERRIDE; |
| |
| status = do_open_permission(rqstp, current_fh, open, accmode); |
| |
| return status; |
| } |
| |
| static void |
| copy_clientid(clientid_t *clid, struct nfsd4_session *session) |
| { |
| struct nfsd4_sessionid *sid = |
| (struct nfsd4_sessionid *)session->se_sessionid.data; |
| |
| clid->cl_boot = sid->clientid.cl_boot; |
| clid->cl_id = sid->clientid.cl_id; |
| } |
| |
| static __be32 |
| nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_open *open = &u->open; |
| __be32 status; |
| struct svc_fh *resfh = NULL; |
| struct net *net = SVC_NET(rqstp); |
| struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
| bool reclaim = false; |
| |
| dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", |
| (int)open->op_fnamelen, open->op_fname, |
| 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 = false; |
| /* |
| * 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->clp->cl_flags) && |
| open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
| return nfserr_grace; |
| |
| if (nfsd4_has_session(cstate)) |
| copy_clientid(&open->op_clientid, cstate->session); |
| |
| /* check seqid for replay. set nfs4_owner */ |
| status = nfsd4_process_open1(cstate, open, nn); |
| if (status == nfserr_replay_me) { |
| struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; |
| fh_put(&cstate->current_fh); |
| fh_copy_shallow(&cstate->current_fh.fh_handle, |
| &rp->rp_openfh); |
| status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
| if (status) |
| dprintk("nfsd4_open: replay failed" |
| " restoring previous filehandle\n"); |
| else |
| status = nfserr_replay_me; |
| } |
| if (status) |
| goto out; |
| if (open->op_xdr_error) { |
| status = open->op_xdr_error; |
| goto out; |
| } |
| |
| status = nfsd4_check_open_attributes(rqstp, cstate, open); |
| if (status) |
| goto out; |
| |
| /* Openowner is now set, so sequence id will get bumped. Now we need |
| * these checks before we do any creates: */ |
| status = nfserr_grace; |
| if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) |
| goto out; |
| status = nfserr_no_grace; |
| if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
| goto out; |
| |
| switch (open->op_claim_type) { |
| case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
| case NFS4_OPEN_CLAIM_NULL: |
| status = do_open_lookup(rqstp, cstate, open, &resfh); |
| if (status) |
| goto out; |
| break; |
| case NFS4_OPEN_CLAIM_PREVIOUS: |
| status = nfs4_check_open_reclaim(cstate->clp); |
| if (status) |
| goto out; |
| open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
| reclaim = true; |
| fallthrough; |
| case NFS4_OPEN_CLAIM_FH: |
| case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
| status = do_open_fhandle(rqstp, cstate, open); |
| if (status) |
| goto out; |
| resfh = &cstate->current_fh; |
| break; |
| case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
| case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
| dprintk("NFSD: unsupported OPEN claim type %d\n", |
| open->op_claim_type); |
| status = nfserr_notsupp; |
| goto out; |
| default: |
| dprintk("NFSD: Invalid OPEN claim type %d\n", |
| open->op_claim_type); |
| status = nfserr_inval; |
| goto out; |
| } |
| /* |
| * nfsd4_process_open2() does the actual opening of the file. If |
| * successful, it (1) truncates the file if open->op_truncate was |
| * set, (2) sets open->op_stateid, (3) sets open->op_delegation. |
| */ |
| status = nfsd4_process_open2(rqstp, resfh, open); |
| WARN(status && open->op_created, |
| "nfsd4_process_open2 failed to open newly-created file! status=%u\n", |
| be32_to_cpu(status)); |
| if (reclaim && !status) |
| nn->somebody_reclaimed = true; |
| out: |
| if (resfh && resfh != &cstate->current_fh) { |
| fh_dup2(&cstate->current_fh, resfh); |
| fh_put(resfh); |
| kfree(resfh); |
| } |
| nfsd4_cleanup_open_state(cstate, open); |
| nfsd4_bump_seqid(cstate, status); |
| return status; |
| } |
| |
| /* |
| * OPEN is the only seqid-mutating operation whose decoding can fail |
| * with a seqid-mutating error (specifically, decoding of user names in |
| * the attributes). Therefore we have to do some processing to look up |
| * the stateowner so that we can bump the seqid. |
| */ |
| static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) |
| { |
| struct nfsd4_open *open = &op->u.open; |
| |
| if (!seqid_mutating_err(ntohl(op->status))) |
| return op->status; |
| if (nfsd4_has_session(cstate)) |
| return op->status; |
| open->op_xdr_error = op->status; |
| return nfsd4_open(rqstp, cstate, &op->u); |
| } |
| |
| /* |
| * filehandle-manipulating ops. |
| */ |
| static __be32 |
| nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| u->getfh = &cstate->current_fh; |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_putfh *putfh = &u->putfh; |
| __be32 ret; |
| |
| fh_put(&cstate->current_fh); |
| cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; |
| memcpy(&cstate->current_fh.fh_handle.fh_raw, putfh->pf_fhval, |
| putfh->pf_fhlen); |
| ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); |
| #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
| if (ret == nfserr_stale && putfh->no_verify) { |
| SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN); |
| ret = 0; |
| } |
| #endif |
| return ret; |
| } |
| |
| static __be32 |
| nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| __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, |
| union nfsd4_op_u *u) |
| { |
| if (!cstate->save_fh.fh_dentry) |
| return nfserr_restorefh; |
| |
| fh_dup2(&cstate->current_fh, &cstate->save_fh); |
| if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) { |
| memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); |
| SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); |
| } |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| fh_dup2(&cstate->save_fh, &cstate->current_fh); |
| if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) { |
| memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); |
| SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG); |
| } |
| return nfs_ok; |
| } |
| |
| /* |
| * misc nfsv4 ops |
| */ |
| static __be32 |
| nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_access *access = &u->access; |
| u32 access_full; |
| |
| access_full = NFS3_ACCESS_FULL; |
| if (cstate->minorversion >= 2) |
| access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD | |
| NFS4_ACCESS_XAWRITE; |
| |
| if (access->ac_req_access & ~access_full) |
| return nfserr_inval; |
| |
| access->ac_resp_access = access->ac_req_access; |
| return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, |
| &access->ac_supported); |
| } |
| |
| static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) |
| { |
| __be32 *verf = (__be32 *)verifier->data; |
| |
| BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data)); |
| |
| nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id)); |
| } |
| |
| static __be32 |
| nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_commit *commit = &u->commit; |
| |
| return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, |
| commit->co_count, |
| (__be32 *)commit->co_verf.data); |
| } |
| |
| static __be32 |
| nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_create *create = &u->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_NOP); |
| if (status) |
| return status; |
| |
| status = check_attr_support(rqstp, cstate, create->cr_bmval, |
| nfsd_attrmask); |
| if (status) |
| return status; |
| |
| current->fs->umask = create->cr_umask; |
| switch (create->cr_type) { |
| case NF4LNK: |
| status = nfsd_symlink(rqstp, &cstate->current_fh, |
| create->cr_name, create->cr_namelen, |
| create->cr_data, &resfh); |
| break; |
| |
| case NF4BLK: |
| status = nfserr_inval; |
| rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); |
| if (MAJOR(rdev) != create->cr_specdata1 || |
| MINOR(rdev) != create->cr_specdata2) |
| goto out_umask; |
| status = nfsd_create(rqstp, &cstate->current_fh, |
| create->cr_name, create->cr_namelen, |
| &create->cr_iattr, S_IFBLK, rdev, &resfh); |
| break; |
| |
| case NF4CHR: |
| status = nfserr_inval; |
| rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); |
| if (MAJOR(rdev) != create->cr_specdata1 || |
| MINOR(rdev) != create->cr_specdata2) |
| goto out_umask; |
| status = nfsd_create(rqstp, &cstate->current_fh, |
| create->cr_name, create->cr_namelen, |
| &create->cr_iattr,S_IFCHR, rdev, &resfh); |
| break; |
| |
| case NF4SOCK: |
| status = nfsd_create(rqstp, &cstate->current_fh, |
| create->cr_name, create->cr_namelen, |
| &create->cr_iattr, S_IFSOCK, 0, &resfh); |
| break; |
| |
| case NF4FIFO: |
| status = nfsd_create(rqstp, &cstate->current_fh, |
| create->cr_name, create->cr_namelen, |
| &create->cr_iattr, S_IFIFO, 0, &resfh); |
| break; |
| |
| case NF4DIR: |
| create->cr_iattr.ia_valid &= ~ATTR_SIZE; |
| status = nfsd_create(rqstp, &cstate->current_fh, |
| create->cr_name, create->cr_namelen, |
| &create->cr_iattr, S_IFDIR, 0, &resfh); |
| break; |
| |
| default: |
| status = nfserr_badtype; |
| } |
| |
| if (status) |
| goto out; |
| |
| if (create->cr_label.len) |
| nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); |
| |
| if (create->cr_acl != NULL) |
| do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, |
| create->cr_bmval); |
| |
| fh_unlock(&cstate->current_fh); |
| set_change_info(&create->cr_cinfo, &cstate->current_fh); |
| fh_dup2(&cstate->current_fh, &resfh); |
| out: |
| fh_put(&resfh); |
| out_umask: |
| current->fs->umask = 0; |
| return status; |
| } |
| |
| static __be32 |
| nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_getattr *getattr = &u->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_suppattrs[cstate->minorversion][0]; |
| getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; |
| getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; |
| |
| getattr->ga_fhp = &cstate->current_fh; |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_link *link = &u->link; |
| __be32 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, |
| union nfsd4_op_u *u) |
| { |
| return nfsd4_do_lookupp(rqstp, &cstate->current_fh); |
| } |
| |
| static __be32 |
| nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| return nfsd_lookup(rqstp, &cstate->current_fh, |
| u->lookup.lo_name, u->lookup.lo_len, |
| &cstate->current_fh); |
| } |
| |
| static __be32 |
| nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_read *read = &u->read; |
| __be32 status; |
| |
| read->rd_nf = NULL; |
| if (read->rd_offset >= OFFSET_MAX) |
| return nfserr_inval; |
| |
| trace_nfsd_read_start(rqstp, &cstate->current_fh, |
| read->rd_offset, read->rd_length); |
| |
| /* |
| * If we do a zero copy read, then a client will see read data |
| * that reflects the state of the file *after* performing the |
| * following compound. |
| * |
| * To ensure proper ordering, we therefore turn off zero copy if |
| * the client wants us to do more in this compound: |
| */ |
| if (!nfsd4_last_compound_op(rqstp)) |
| clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); |
| |
| /* check stateid */ |
| status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, |
| &read->rd_stateid, RD_STATE, |
| &read->rd_nf, NULL); |
| if (status) { |
| dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); |
| goto out; |
| } |
| status = nfs_ok; |
| out: |
| read->rd_rqstp = rqstp; |
| read->rd_fhp = &cstate->current_fh; |
| return status; |
| } |
| |
| |
| static void |
| nfsd4_read_release(union nfsd4_op_u *u) |
| { |
| if (u->read.rd_nf) |
| nfsd_file_put(u->read.rd_nf); |
| trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp, |
| u->read.rd_offset, u->read.rd_length); |
| } |
| |
| static __be32 |
| nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_readdir *readdir = &u->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_suppattrs[cstate->minorversion][0]; |
| readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; |
| readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; |
| |
| 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, |
| union nfsd4_op_u *u) |
| { |
| u->readlink.rl_rqstp = rqstp; |
| u->readlink.rl_fhp = &cstate->current_fh; |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_remove *remove = &u->remove; |
| __be32 status; |
| |
| if (opens_in_grace(SVC_NET(rqstp))) |
| return nfserr_grace; |
| status = nfsd_unlink(rqstp, &cstate->current_fh, 0, |
| remove->rm_name, remove->rm_namelen); |
| if (!status) { |
| fh_unlock(&cstate->current_fh); |
| set_change_info(&remove->rm_cinfo, &cstate->current_fh); |
| } |
| return status; |
| } |
| |
| static __be32 |
| nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_rename *rename = &u->rename; |
| __be32 status; |
| |
| if (opens_in_grace(SVC_NET(rqstp))) |
| return nfserr_grace; |
| status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, |
| rename->rn_snamelen, &cstate->current_fh, |
| rename->rn_tname, rename->rn_tnamelen); |
| if (status) |
| return status; |
| set_change_info(&rename->rn_sinfo, &cstate->current_fh); |
| set_change_info(&rename->rn_tinfo, &cstate->save_fh); |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_secinfo *secinfo = &u->secinfo; |
| struct svc_export *exp; |
| struct dentry *dentry; |
| __be32 err; |
| |
| 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; |
| fh_unlock(&cstate->current_fh); |
| if (d_really_is_negative(dentry)) { |
| 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, |
| union nfsd4_op_u *u) |
| { |
| __be32 err; |
| |
| switch (u->secinfo_no_name.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; |
| } |
| |
| u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); |
| fh_put(&cstate->current_fh); |
| return nfs_ok; |
| } |
| |
| static void |
| nfsd4_secinfo_release(union nfsd4_op_u *u) |
| { |
| if (u->secinfo.si_exp) |
| exp_put(u->secinfo.si_exp); |
| } |
| |
| static void |
| nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) |
| { |
| if (u->secinfo_no_name.sin_exp) |
| exp_put(u->secinfo_no_name.sin_exp); |
| } |
| |
| static __be32 |
| nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_setattr *setattr = &u->setattr; |
| __be32 status = nfs_ok; |
| int err; |
| |
| if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { |
| status = nfs4_preprocess_stateid_op(rqstp, cstate, |
| &cstate->current_fh, &setattr->sa_stateid, |
| WR_STATE, NULL, NULL); |
| if (status) { |
| dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); |
| return status; |
| } |
| } |
| err = fh_want_write(&cstate->current_fh); |
| if (err) |
| return nfserrno(err); |
| status = nfs_ok; |
| |
| status = check_attr_support(rqstp, cstate, setattr->sa_bmval, |
| nfsd_attrmask); |
| if (status) |
| goto out; |
| |
| if (setattr->sa_acl != NULL) |
| status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, |
| setattr->sa_acl); |
| if (status) |
| goto out; |
| if (setattr->sa_label.len) |
| status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, |
| &setattr->sa_label); |
| if (status) |
| goto out; |
| status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, |
| 0, (time64_t)0); |
| out: |
| fh_drop_write(&cstate->current_fh); |
| return status; |
| } |
| |
| static __be32 |
| nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_write *write = &u->write; |
| stateid_t *stateid = &write->wr_stateid; |
| struct nfsd_file *nf = NULL; |
| __be32 status = nfs_ok; |
| unsigned long cnt; |
| int nvecs; |
| |
| if (write->wr_offset >= OFFSET_MAX) |
| return nfserr_inval; |
| |
| cnt = write->wr_buflen; |
| trace_nfsd_write_start(rqstp, &cstate->current_fh, |
| write->wr_offset, cnt); |
| status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, |
| stateid, WR_STATE, &nf, NULL); |
| if (status) { |
| dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); |
| return status; |
| } |
| |
| write->wr_how_written = write->wr_stable_how; |
| |
| nvecs = svc_fill_write_vector(rqstp, &write->wr_payload); |
| WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); |
| |
| status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf, |
| write->wr_offset, rqstp->rq_vec, nvecs, &cnt, |
| write->wr_how_written, |
| (__be32 *)write->wr_verifier.data); |
| nfsd_file_put(nf); |
| |
| write->wr_bytes_written = cnt; |
| trace_nfsd_write_done(rqstp, &cstate->current_fh, |
| write->wr_offset, cnt); |
| return status; |
| } |
| |
| static __be32 |
| nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| stateid_t *src_stateid, struct nfsd_file **src, |
| stateid_t *dst_stateid, struct nfsd_file **dst) |
| { |
| __be32 status; |
| |
| if (!cstate->save_fh.fh_dentry) |
| return nfserr_nofilehandle; |
| |
| status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, |
| src_stateid, RD_STATE, src, NULL); |
| if (status) { |
| dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); |
| goto out; |
| } |
| |
| status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, |
| dst_stateid, WR_STATE, dst, NULL); |
| if (status) { |
| dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); |
| goto out_put_src; |
| } |
| |
| /* fix up for NFS-specific error code */ |
| if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) || |
| !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) { |
| status = nfserr_wrong_type; |
| goto out_put_dst; |
| } |
| |
| out: |
| return status; |
| out_put_dst: |
| nfsd_file_put(*dst); |
| out_put_src: |
| nfsd_file_put(*src); |
| goto out; |
| } |
| |
| static __be32 |
| nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_clone *clone = &u->clone; |
| struct nfsd_file *src, *dst; |
| __be32 status; |
| |
| status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, |
| &clone->cl_dst_stateid, &dst); |
| if (status) |
| goto out; |
| |
| status = nfsd4_clone_file_range(src, clone->cl_src_pos, |
| dst, clone->cl_dst_pos, clone->cl_count, |
| EX_ISSYNC(cstate->current_fh.fh_export)); |
| |
| nfsd_file_put(dst); |
| nfsd_file_put(src); |
| out: |
| return status; |
| } |
| |
| void nfs4_put_copy(struct nfsd4_copy *copy) |
| { |
| if (!refcount_dec_and_test(©->refcount)) |
| return; |
| kfree(copy); |
| } |
| |
| static bool |
| check_and_set_stop_copy(struct nfsd4_copy *copy) |
| { |
| bool value; |
| |
| spin_lock(©->cp_clp->async_lock); |
| value = copy->stopped; |
| if (!copy->stopped) |
| copy->stopped = true; |
| spin_unlock(©->cp_clp->async_lock); |
| return value; |
| } |
| |
| static void nfsd4_stop_copy(struct nfsd4_copy *copy) |
| { |
| /* only 1 thread should stop the copy */ |
| if (!check_and_set_stop_copy(copy)) |
| kthread_stop(copy->copy_task); |
| nfs4_put_copy(copy); |
| } |
| |
| static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp) |
| { |
| struct nfsd4_copy *copy = NULL; |
| |
| spin_lock(&clp->async_lock); |
| if (!list_empty(&clp->async_copies)) { |
| copy = list_first_entry(&clp->async_copies, struct nfsd4_copy, |
| copies); |
| refcount_inc(©->refcount); |
| } |
| spin_unlock(&clp->async_lock); |
| return copy; |
| } |
| |
| void nfsd4_shutdown_copy(struct nfs4_client *clp) |
| { |
| struct nfsd4_copy *copy; |
| |
| while ((copy = nfsd4_get_copy(clp)) != NULL) |
| nfsd4_stop_copy(copy); |
| } |
| #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
| |
| extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, |
| struct nfs_fh *src_fh, |
| nfs4_stateid *stateid); |
| extern void nfs42_ssc_close(struct file *filep); |
| |
| extern void nfs_sb_deactive(struct super_block *sb); |
| |
| #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys" |
| |
| /* |
| * setup a work entry in the ssc delayed unmount list. |
| */ |
| static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr, |
| struct nfsd4_ssc_umount_item **retwork, struct vfsmount **ss_mnt) |
| { |
| struct nfsd4_ssc_umount_item *ni = NULL; |
| struct nfsd4_ssc_umount_item *work = NULL; |
| struct nfsd4_ssc_umount_item *tmp; |
| DEFINE_WAIT(wait); |
| |
| *ss_mnt = NULL; |
| *retwork = NULL; |
| work = kzalloc(sizeof(*work), GFP_KERNEL); |
| try_again: |
| spin_lock(&nn->nfsd_ssc_lock); |
| list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { |
| if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr))) |
| continue; |
| /* found a match */ |
| if (ni->nsui_busy) { |
| /* wait - and try again */ |
| prepare_to_wait(&nn->nfsd_ssc_waitq, &wait, |
| TASK_INTERRUPTIBLE); |
| spin_unlock(&nn->nfsd_ssc_lock); |
| |
| /* allow 20secs for mount/unmount for now - revisit */ |
| if (signal_pending(current) || |
| (schedule_timeout(20*HZ) == 0)) { |
| kfree(work); |
| return nfserr_eagain; |
| } |
| finish_wait(&nn->nfsd_ssc_waitq, &wait); |
| goto try_again; |
| } |
| *ss_mnt = ni->nsui_vfsmount; |
| refcount_inc(&ni->nsui_refcnt); |
| spin_unlock(&nn->nfsd_ssc_lock); |
| kfree(work); |
| |
| /* return vfsmount in ss_mnt */ |
| return 0; |
| } |
| if (work) { |
| strncpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr)); |
| refcount_set(&work->nsui_refcnt, 2); |
| work->nsui_busy = true; |
| list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list); |
| *retwork = work; |
| } |
| spin_unlock(&nn->nfsd_ssc_lock); |
| return 0; |
| } |
| |
| static void nfsd4_ssc_update_dul_work(struct nfsd_net *nn, |
| struct nfsd4_ssc_umount_item *work, struct vfsmount *ss_mnt) |
| { |
| /* set nsui_vfsmount, clear busy flag and wakeup waiters */ |
| spin_lock(&nn->nfsd_ssc_lock); |
| work->nsui_vfsmount = ss_mnt; |
| work->nsui_busy = false; |
| wake_up_all(&nn->nfsd_ssc_waitq); |
| spin_unlock(&nn->nfsd_ssc_lock); |
| } |
| |
| static void nfsd4_ssc_cancel_dul_work(struct nfsd_net *nn, |
| struct nfsd4_ssc_umount_item *work) |
| { |
| spin_lock(&nn->nfsd_ssc_lock); |
| list_del(&work->nsui_list); |
| wake_up_all(&nn->nfsd_ssc_waitq); |
| spin_unlock(&nn->nfsd_ssc_lock); |
| kfree(work); |
| } |
| |
| /* |
| * Support one copy source server for now. |
| */ |
| static __be32 |
| nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp, |
| struct vfsmount **mount) |
| { |
| struct file_system_type *type; |
| struct vfsmount *ss_mnt; |
| struct nfs42_netaddr *naddr; |
| struct sockaddr_storage tmp_addr; |
| size_t tmp_addrlen, match_netid_len = 3; |
| char *startsep = "", *endsep = "", *match_netid = "tcp"; |
| char *ipaddr, *dev_name, *raw_data; |
| int len, raw_len; |
| __be32 status = nfserr_inval; |
| struct nfsd4_ssc_umount_item *work = NULL; |
| struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| |
| naddr = &nss->u.nl4_addr; |
| tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr, |
| naddr->addr_len, |
| (struct sockaddr *)&tmp_addr, |
| sizeof(tmp_addr)); |
| if (tmp_addrlen == 0) |
| goto out_err; |
| |
| if (tmp_addr.ss_family == AF_INET6) { |
| startsep = "["; |
| endsep = "]"; |
| match_netid = "tcp6"; |
| match_netid_len = 4; |
| } |
| |
| if (naddr->netid_len != match_netid_len || |
| strncmp(naddr->netid, match_netid, naddr->netid_len)) |
| goto out_err; |
| |
| /* Construct the raw data for the vfs_kern_mount call */ |
| len = RPC_MAX_ADDRBUFLEN + 1; |
| ipaddr = kzalloc(len, GFP_KERNEL); |
| if (!ipaddr) |
| goto out_err; |
| |
| rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len); |
| |
| /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/ |
| |
| raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr); |
| raw_data = kzalloc(raw_len, GFP_KERNEL); |
| if (!raw_data) |
| goto out_free_ipaddr; |
| |
| snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr); |
| |
| status = nfserr_nodev; |
| type = get_fs_type("nfs"); |
| if (!type) |
| goto out_free_rawdata; |
| |
| /* Set the server:<export> for the vfs_kern_mount call */ |
| dev_name = kzalloc(len + 5, GFP_KERNEL); |
| if (!dev_name) |
| goto out_free_rawdata; |
| snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep); |
| |
| status = nfsd4_ssc_setup_dul(nn, ipaddr, &work, &ss_mnt); |
| if (status) |
| goto out_free_devname; |
| if (ss_mnt) |
| goto out_done; |
| |
| /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */ |
| ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data); |
| module_put(type->owner); |
| if (IS_ERR(ss_mnt)) { |
| status = nfserr_nodev; |
| if (work) |
| nfsd4_ssc_cancel_dul_work(nn, work); |
| goto out_free_devname; |
| } |
| if (work) |
| nfsd4_ssc_update_dul_work(nn, work, ss_mnt); |
| out_done: |
| status = 0; |
| *mount = ss_mnt; |
| |
| out_free_devname: |
| kfree(dev_name); |
| out_free_rawdata: |
| kfree(raw_data); |
| out_free_ipaddr: |
| kfree(ipaddr); |
| out_err: |
| return status; |
| } |
| |
| static void |
| nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) |
| { |
| nfs_do_sb_deactive(ss_mnt->mnt_sb); |
| mntput(ss_mnt); |
| } |
| |
| /* |
| * Verify COPY destination stateid. |
| * |
| * Connect to the source server with NFSv4.1. |
| * Create the source struct file for nfsd_copy_range. |
| * Called with COPY cstate: |
| * SAVED_FH: source filehandle |
| * CURRENT_FH: destination filehandle |
| */ |
| static __be32 |
| nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, |
| struct nfsd4_copy *copy, struct vfsmount **mount) |
| { |
| struct svc_fh *s_fh = NULL; |
| stateid_t *s_stid = ©->cp_src_stateid; |
| __be32 status = nfserr_inval; |
| |
| /* Verify the destination stateid and set dst struct file*/ |
| status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, |
| ©->cp_dst_stateid, |
| WR_STATE, ©->nf_dst, NULL); |
| if (status) |
| goto out; |
| |
| status = nfsd4_interssc_connect(©->cp_src, rqstp, mount); |
| if (status) |
| goto out; |
| |
| s_fh = &cstate->save_fh; |
| |
| copy->c_fh.size = s_fh->fh_handle.fh_size; |
| memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_raw, copy->c_fh.size); |
| copy->stateid.seqid = cpu_to_be32(s_stid->si_generation); |
| memcpy(copy->stateid.other, (void *)&s_stid->si_opaque, |
| sizeof(stateid_opaque_t)); |
| |
| status = 0; |
| out: |
| return status; |
| } |
| |
| static void |
| nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, |
| struct nfsd_file *dst) |
| { |
| bool found = false; |
| long timeout; |
| struct nfsd4_ssc_umount_item *tmp; |
| struct nfsd4_ssc_umount_item *ni = NULL; |
| struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id); |
| |
| nfs42_ssc_close(src->nf_file); |
| nfsd_file_put(dst); |
| fput(src->nf_file); |
| |
| if (!nn) { |
| mntput(ss_mnt); |
| return; |
| } |
| spin_lock(&nn->nfsd_ssc_lock); |
| timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout); |
| list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) { |
| if (ni->nsui_vfsmount->mnt_sb == ss_mnt->mnt_sb) { |
| list_del(&ni->nsui_list); |
| /* |
| * vfsmount can be shared by multiple exports, |
| * decrement refcnt. If the count drops to 1 it |
| * will be unmounted when nsui_expire expires. |
| */ |
| refcount_dec(&ni->nsui_refcnt); |
| ni->nsui_expire = jiffies + timeout; |
| list_add_tail(&ni->nsui_list, &nn->nfsd_ssc_mount_list); |
| found = true; |
| break; |
| } |
| } |
| spin_unlock(&nn->nfsd_ssc_lock); |
| if (!found) { |
| mntput(ss_mnt); |
| return; |
| } |
| } |
| |
| #else /* CONFIG_NFSD_V4_2_INTER_SSC */ |
| |
| static __be32 |
| nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, |
| struct nfsd4_copy *copy, |
| struct vfsmount **mount) |
| { |
| *mount = NULL; |
| return nfserr_inval; |
| } |
| |
| static void |
| nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, |
| struct nfsd_file *dst) |
| { |
| } |
| |
| static void |
| nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) |
| { |
| } |
| |
| static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, |
| struct nfs_fh *src_fh, |
| nfs4_stateid *stateid) |
| { |
| return NULL; |
| } |
| #endif /* CONFIG_NFSD_V4_2_INTER_SSC */ |
| |
| static __be32 |
| nfsd4_setup_intra_ssc(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, |
| struct nfsd4_copy *copy) |
| { |
| return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, |
| ©->nf_src, ©->cp_dst_stateid, |
| ©->nf_dst); |
| } |
| |
| static void |
| nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst) |
| { |
| nfsd_file_put(src); |
| nfsd_file_put(dst); |
| } |
| |
| static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) |
| { |
| struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb); |
| |
| nfs4_put_copy(copy); |
| } |
| |
| static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, |
| struct rpc_task *task) |
| { |
| return 1; |
| } |
| |
| static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { |
| .release = nfsd4_cb_offload_release, |
| .done = nfsd4_cb_offload_done |
| }; |
| |
| static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) |
| { |
| copy->cp_res.wr_stable_how = |
| copy->committed ? NFS_FILE_SYNC : NFS_UNSTABLE; |
| copy->cp_synchronous = sync; |
| gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); |
| } |
| |
| static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) |
| { |
| ssize_t bytes_copied = 0; |
| u64 bytes_total = copy->cp_count; |
| u64 src_pos = copy->cp_src_pos; |
| u64 dst_pos = copy->cp_dst_pos; |
| __be32 status; |
| |
| /* See RFC 7862 p.67: */ |
| if (bytes_total == 0) |
| bytes_total = ULLONG_MAX; |
| do { |
| if (kthread_should_stop()) |
| break; |
| bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file, |
| src_pos, copy->nf_dst->nf_file, dst_pos, |
| bytes_total); |
| if (bytes_copied <= 0) |
| break; |
| bytes_total -= bytes_copied; |
| copy->cp_res.wr_bytes_written += bytes_copied; |
| src_pos += bytes_copied; |
| dst_pos += bytes_copied; |
| } while (bytes_total > 0 && !copy->cp_synchronous); |
| /* for a non-zero asynchronous copy do a commit of data */ |
| if (!copy->cp_synchronous && copy->cp_res.wr_bytes_written > 0) { |
| down_write(©->nf_dst->nf_rwsem); |
| status = vfs_fsync_range(copy->nf_dst->nf_file, |
| copy->cp_dst_pos, |
| copy->cp_res.wr_bytes_written, 0); |
| up_write(©->nf_dst->nf_rwsem); |
| if (!status) |
| copy->committed = true; |
| } |
| return bytes_copied; |
| } |
| |
| static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync) |
| { |
| __be32 status; |
| ssize_t bytes; |
| |
| bytes = _nfsd_copy_file_range(copy); |
| /* for async copy, we ignore the error, client can always retry |
| * to get the error |
| */ |
| if (bytes < 0 && !copy->cp_res.wr_bytes_written) |
| status = nfserrno(bytes); |
| else { |
| nfsd4_init_copy_res(copy, sync); |
| status = nfs_ok; |
| } |
| |
| if (!copy->cp_intra) /* Inter server SSC */ |
| nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src, |
| copy->nf_dst); |
| else |
| nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst); |
| |
| return status; |
| } |
| |
| static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) |
| { |
| dst->cp_src_pos = src->cp_src_pos; |
| dst->cp_dst_pos = src->cp_dst_pos; |
| dst->cp_count = src->cp_count; |
| dst->cp_synchronous = src->cp_synchronous; |
| memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res)); |
| memcpy(&dst->fh, &src->fh, sizeof(src->fh)); |
| dst->cp_clp = src->cp_clp; |
| dst->nf_dst = nfsd_file_get(src->nf_dst); |
| dst->cp_intra = src->cp_intra; |
| if (src->cp_intra) /* for inter, file_src doesn't exist yet */ |
| dst->nf_src = nfsd_file_get(src->nf_src); |
| |
| memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); |
| memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server)); |
| memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid)); |
| memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh)); |
| dst->ss_mnt = src->ss_mnt; |
| } |
| |
| static void cleanup_async_copy(struct nfsd4_copy *copy) |
| { |
| nfs4_free_copy_state(copy); |
| nfsd_file_put(copy->nf_dst); |
| if (copy->cp_intra) |
| nfsd_file_put(copy->nf_src); |
| spin_lock(©->cp_clp->async_lock); |
| list_del(©->copies); |
| spin_unlock(©->cp_clp->async_lock); |
| nfs4_put_copy(copy); |
| } |
| |
| static int nfsd4_do_async_copy(void *data) |
| { |
| struct nfsd4_copy *copy = (struct nfsd4_copy *)data; |
| struct nfsd4_copy *cb_copy; |
| |
| if (!copy->cp_intra) { /* Inter server SSC */ |
| copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL); |
| if (!copy->nf_src) { |
| copy->nfserr = nfserr_serverfault; |
| nfsd4_interssc_disconnect(copy->ss_mnt); |
| goto do_callback; |
| } |
| copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh, |
| ©->stateid); |
| if (IS_ERR(copy->nf_src->nf_file)) { |
| copy->nfserr = nfserr_offload_denied; |
| nfsd4_interssc_disconnect(copy->ss_mnt); |
| goto do_callback; |
| } |
| } |
| |
| copy->nfserr = nfsd4_do_copy(copy, 0); |
| do_callback: |
| cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); |
| if (!cb_copy) |
| goto out; |
| refcount_set(&cb_copy->refcount, 1); |
| memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); |
| cb_copy->cp_clp = copy->cp_clp; |
| cb_copy->nfserr = copy->nfserr; |
| memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); |
| nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, |
| &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); |
| trace_nfsd_cb_offload(copy->cp_clp, ©->cp_res.cb_stateid, |
| ©->fh, copy->cp_count, copy->nfserr); |
| nfsd4_run_cb(&cb_copy->cp_cb); |
| out: |
| if (!copy->cp_intra) |
| kfree(copy->nf_src); |
| cleanup_async_copy(copy); |
| return 0; |
| } |
| |
| static __be32 |
| nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_copy *copy = &u->copy; |
| __be32 status; |
| struct nfsd4_copy *async_copy = NULL; |
| |
| if (!copy->cp_intra) { /* Inter server SSC */ |
| if (!inter_copy_offload_enable || copy->cp_synchronous) { |
| status = nfserr_notsupp; |
| goto out; |
| } |
| status = nfsd4_setup_inter_ssc(rqstp, cstate, copy, |
| ©->ss_mnt); |
| if (status) |
| return nfserr_offload_denied; |
| } else { |
| status = nfsd4_setup_intra_ssc(rqstp, cstate, copy); |
| if (status) |
| return status; |
| } |
| |
| copy->cp_clp = cstate->clp; |
| memcpy(©->fh, &cstate->current_fh.fh_handle, |
| sizeof(struct knfsd_fh)); |
| if (!copy->cp_synchronous) { |
| struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| |
| status = nfserrno(-ENOMEM); |
| async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); |
| if (!async_copy) |
| goto out_err; |
| if (!nfs4_init_copy_state(nn, copy)) |
| goto out_err; |
| refcount_set(&async_copy->refcount, 1); |
| memcpy(©->cp_res.cb_stateid, ©->cp_stateid.stid, |
| sizeof(copy->cp_res.cb_stateid)); |
| dup_copy_fields(copy, async_copy); |
| async_copy->copy_task = kthread_create(nfsd4_do_async_copy, |
| async_copy, "%s", "copy thread"); |
| if (IS_ERR(async_copy->copy_task)) |
| goto out_err; |
| spin_lock(&async_copy->cp_clp->async_lock); |
| list_add(&async_copy->copies, |
| &async_copy->cp_clp->async_copies); |
| spin_unlock(&async_copy->cp_clp->async_lock); |
| wake_up_process(async_copy->copy_task); |
| status = nfs_ok; |
| } else { |
| status = nfsd4_do_copy(copy, 1); |
| } |
| out: |
| return status; |
| out_err: |
| if (async_copy) |
| cleanup_async_copy(async_copy); |
| status = nfserrno(-ENOMEM); |
| if (!copy->cp_intra) |
| nfsd4_interssc_disconnect(copy->ss_mnt); |
| goto out; |
| } |
| |
| struct nfsd4_copy * |
| find_async_copy(struct nfs4_client *clp, stateid_t *stateid) |
| { |
| struct nfsd4_copy *copy; |
| |
| spin_lock(&clp->async_lock); |
| list_for_each_entry(copy, &clp->async_copies, copies) { |
| if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE)) |
| continue; |
| refcount_inc(©->refcount); |
| spin_unlock(&clp->async_lock); |
| return copy; |
| } |
| spin_unlock(&clp->async_lock); |
| return NULL; |
| } |
| |
| static __be32 |
| nfsd4_offload_cancel(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_offload_status *os = &u->offload_status; |
| struct nfsd4_copy *copy; |
| struct nfs4_client *clp = cstate->clp; |
| |
| copy = find_async_copy(clp, &os->stateid); |
| if (!copy) { |
| struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| |
| return manage_cpntf_state(nn, &os->stateid, clp, NULL); |
| } else |
| nfsd4_stop_copy(copy); |
| |
| return nfs_ok; |
| } |
| |
| static __be32 |
| nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_copy_notify *cn = &u->copy_notify; |
| __be32 status; |
| struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| struct nfs4_stid *stid; |
| struct nfs4_cpntf_state *cps; |
| struct nfs4_client *clp = cstate->clp; |
| |
| status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, |
| &cn->cpn_src_stateid, RD_STATE, NULL, |
| &stid); |
| if (status) |
| return status; |
| |
| cn->cpn_sec = nn->nfsd4_lease; |
| cn->cpn_nsec = 0; |
| |
| status = nfserrno(-ENOMEM); |
| cps = nfs4_alloc_init_cpntf_state(nn, stid); |
| if (!cps) |
| goto out; |
| memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t)); |
| memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t)); |
| memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t)); |
| |
| /* For now, only return one server address in cpn_src, the |
| * address used by the client to connect to this server. |
| */ |
| cn->cpn_src.nl4_type = NL4_NETADDR; |
| status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr, |
| &cn->cpn_src.u.nl4_addr); |
| WARN_ON_ONCE(status); |
| if (status) { |
| nfs4_put_cpntf_state(nn, cps); |
| goto out; |
| } |
| out: |
| nfs4_put_stid(stid); |
| return status; |
| } |
| |
| static __be32 |
| nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| struct nfsd4_fallocate *fallocate, int flags) |
| { |
| __be32 status; |
| struct nfsd_file *nf; |
| |
| status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, |
| &fallocate->falloc_stateid, |
| WR_STATE, &nf, NULL); |
| if (status != nfs_ok) { |
| dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); |
| return status; |
| } |
| |
| status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file, |
| fallocate->falloc_offset, |
| fallocate->falloc_length, |
| flags); |
| nfsd_file_put(nf); |
| return status; |
| } |
| static __be32 |
| nfsd4_offload_status(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_offload_status *os = &u->offload_status; |
| __be32 status = 0; |
| struct nfsd4_copy *copy; |
| struct nfs4_client *clp = cstate->clp; |
| |
| copy = find_async_copy(clp, &os->stateid); |
| if (copy) { |
| os->count = copy->cp_res.wr_bytes_written; |
| nfs4_put_copy(copy); |
| } else |
| status = nfserr_bad_stateid; |
| |
| return status; |
| } |
| |
| static __be32 |
| nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); |
| } |
| |
| static __be32 |
| nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| return nfsd4_fallocate(rqstp, cstate, &u->deallocate, |
| FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); |
| } |
| |
| static __be32 |
| nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_seek *seek = &u->seek; |
| int whence; |
| __be32 status; |
| struct nfsd_file *nf; |
| |
| status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, |
| &seek->seek_stateid, |
| RD_STATE, &nf, NULL); |
| if (status) { |
| dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); |
| return status; |
| } |
| |
| switch (seek->seek_whence) { |
| case NFS4_CONTENT_DATA: |
| whence = SEEK_DATA; |
| break; |
| case NFS4_CONTENT_HOLE: |
| whence = SEEK_HOLE; |
| break; |
| default: |
| status = nfserr_union_notsupp; |
| goto out; |
| } |
| |
| /* |
| * Note: This call does change file->f_pos, but nothing in NFSD |
| * should ever file->f_pos. |
| */ |
| seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence); |
| if (seek->seek_pos < 0) |
| status = nfserrno(seek->seek_pos); |
| else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file))) |
| seek->seek_eof = true; |
| |
| out: |
| nfsd_file_put(nf); |
| return status; |
| } |
| |
| /* This routine never returns NFS_OK! If there are no other errors, it |
| * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the |
| * attributes matched. VERIFY is implemented by mapping NFSERR_SAME |
| * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. |
| */ |
| static __be32 |
| _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| struct nfsd4_verify *verify) |
| { |
| __be32 *buf, *p; |
| int count; |
| __be32 status; |
| |
| status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); |
| if (status) |
| return status; |
| |
| status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); |
| if (status) |
| return status; |
| |
| if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) |
| || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) |
| return nfserr_inval; |
| if (verify->ve_attrlen & 3) |
| return nfserr_inval; |
| |
| /* count in words: |
| * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 |
| */ |
| count = 4 + (verify->ve_attrlen >> 2); |
| buf = kmalloc(count << 2, GFP_KERNEL); |
| if (!buf) |
| return nfserr_jukebox; |
| |
| p = buf; |
| status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, |
| cstate->current_fh.fh_export, |
| cstate->current_fh.fh_dentry, |
| verify->ve_bmval, |
| rqstp, 0); |
| /* |
| * If nfsd4_encode_fattr() ran out of space, assume that's because |
| * the attributes are longer (hence different) than those given: |
| */ |
| if (status == nfserr_resource) |
| status = nfserr_not_same; |
| if (status) |
| goto out_kfree; |
| |
| /* skip bitmap */ |
| p = buf + 1 + ntohl(buf[0]); |
| status = nfserr_not_same; |
| if (ntohl(*p++) != verify->ve_attrlen) |
| goto out_kfree; |
| if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) |
| status = nfserr_same; |
| |
| out_kfree: |
| kfree(buf); |
| return status; |
| } |
| |
| static __be32 |
| nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| __be32 status; |
| |
| status = _nfsd4_verify(rqstp, cstate, &u->verify); |
| return status == nfserr_not_same ? nfs_ok : status; |
| } |
| |
| static __be32 |
| nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| __be32 status; |
| |
| status = _nfsd4_verify(rqstp, cstate, &u->nverify); |
| return status == nfserr_same ? nfs_ok : status; |
| } |
| |
| #ifdef CONFIG_NFSD_PNFS |
| static const struct nfsd4_layout_ops * |
| nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) |
| { |
| if (!exp->ex_layout_types) { |
| dprintk("%s: export does not support pNFS\n", __func__); |
| return NULL; |
| } |
| |
| if (layout_type >= LAYOUT_TYPE_MAX || |
| !(exp->ex_layout_types & (1 << layout_type))) { |
| dprintk("%s: layout type %d not supported\n", |
| __func__, layout_type); |
| return NULL; |
| } |
| |
| return nfsd4_layout_ops[layout_type]; |
| } |
| |
| static __be32 |
| nfsd4_getdeviceinfo(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
| { |
| struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; |
| const struct nfsd4_layout_ops *ops; |
| struct nfsd4_deviceid_map *map; |
| struct svc_export *exp; |
| __be32 nfserr; |
| |
| dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", |
| __func__, |
| gdp->gd_layout_type, |
| gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, |
| gdp->gd_maxcount); |
| |
| map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); |
| if (!map) { |
| dprintk("%s: couldn't find device ID to export mapping!\n", |
| __func__); |
| return nfserr_noent; |
| } |
| |
| exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); |
| if (IS_ERR(exp)) { |
| dprintk("%s: could not find device id\n", __func__); |
| return nfserr_noent; |
| } |
| |
| nfserr = nfserr_layoutunavailable; |
| ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); |
| if (!ops) |
| goto out; |
| |
| nfserr = nfs_ok; |
| if (gdp->gd_maxcount != 0) { |
| nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, |
| rqstp, cstate->clp, gdp); |
| } |
| |
| gdp->gd_notify_types &= ops->notify_types; |
| out: |
| exp_put(exp); |
| return nfserr; |
| } |
| |
| static void |
| nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) |
| { |
| kfree(u->getdeviceinfo.gd_device); |
| } |
| |
| static __be32 |
| nfsd4_layoutget(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
| { |
| struct nfsd4_layoutget *lgp = &u->layoutget; |
| struct svc_fh *current_fh = &cstate->current_fh; |
| const struct nfsd4_layout_ops *ops; |
| struct nfs4_layout_stateid *ls; |
| __be32 nfserr; |
| int accmode = NFSD_MAY_READ_IF_EXEC; |
| |
| switch (lgp->lg_seg.iomode) { |
| case IOMODE_READ: |
| accmode |= NFSD_MAY_READ; |
| break; |
| case IOMODE_RW: |
| accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; |
| break; |
| default: |
| dprintk("%s: invalid iomode %d\n", |
| __func__, lgp->lg_seg.iomode); |
| nfserr = nfserr_badiomode; |
| goto out; |
| } |
| |
| nfserr = fh_verify(rqstp, current_fh, 0, accmode); |
| if (nfserr) |
| goto out; |
| |
| nfserr = nfserr_layoutunavailable; |
| ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); |
| if (!ops) |
| goto out; |
| |
| /* |
| * Verify minlength and range as per RFC5661: |
| * o If loga_length is less than loga_minlength, |
| * the metadata server MUST return NFS4ERR_INVAL. |
| * o If the sum of loga_offset and loga_minlength exceeds |
| * NFS4_UINT64_MAX, and loga_minlength is not |
| * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. |
| * o If the sum of loga_offset and loga_length exceeds |
| * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, |
| * the error NFS4ERR_INVAL MUST result. |
| */ |
| nfserr = nfserr_inval; |
| if (lgp->lg_seg.length < lgp->lg_minlength || |
| (lgp->lg_minlength != NFS4_MAX_UINT64 && |
| lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || |
| (lgp->lg_seg.length != NFS4_MAX_UINT64 && |
| lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) |
| goto out; |
| if (lgp->lg_seg.length == 0) |
| goto out; |
| |
| nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, |
| true, lgp->lg_layout_type, &ls); |
| if (nfserr) { |
| trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); |
| goto out; |
| } |
| |
| nfserr = nfserr_recallconflict; |
| if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) |
| goto out_put_stid; |
| |
| nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), |
| current_fh, lgp); |
| if (nfserr) |
| goto out_put_stid; |
| |
| nfserr = nfsd4_insert_layout(lgp, ls); |
| |
| out_put_stid: |
| mutex_unlock(&ls->ls_mutex); |
| nfs4_put_stid(&ls->ls_stid); |
| out: |
| return nfserr; |
| } |
| |
| static void |
| nfsd4_layoutget_release(union nfsd4_op_u *u) |
| { |
| kfree(u->layoutget.lg_content); |
| } |
| |
| static __be32 |
| nfsd4_layoutcommit(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
| { |
| struct nfsd4_layoutcommit *lcp = &u->layoutcommit; |
| const struct nfsd4_layout_seg *seg = &lcp->lc_seg; |
| struct svc_fh *current_fh = &cstate->current_fh; |
| const struct nfsd4_layout_ops *ops; |
| loff_t new_size = lcp->lc_last_wr + 1; |
| struct inode *inode; |
| struct nfs4_layout_stateid *ls; |
| __be32 nfserr; |
| |
| nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); |
| if (nfserr) |
| goto out; |
| |
| nfserr = nfserr_layoutunavailable; |
| ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); |
| if (!ops) |
| goto out; |
| inode = d_inode(current_fh->fh_dentry); |
| |
| nfserr = nfserr_inval; |
| if (new_size <= seg->offset) { |
| dprintk("pnfsd: last write before layout segment\n"); |
| goto out; |
| } |
| if (new_size > seg->offset + seg->length) { |
| dprintk("pnfsd: last write beyond layout segment\n"); |
| goto out; |
| } |
| if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { |
| dprintk("pnfsd: layoutcommit beyond EOF\n"); |
| goto out; |
| } |
| |
| nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, |
| false, lcp->lc_layout_type, |
| &ls); |
| if (nfserr) { |
| trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); |
| /* fixup error code as per RFC5661 */ |
| if (nfserr == nfserr_bad_stateid) |
| nfserr = nfserr_badlayout; |
| goto out; |
| } |
| |
| /* LAYOUTCOMMIT does not require any serialization */ |
| mutex_unlock(&ls->ls_mutex); |
| |
| if (new_size > i_size_read(inode)) { |
| lcp->lc_size_chg = 1; |
| lcp->lc_newsize = new_size; |
| } else { |
| lcp->lc_size_chg = 0; |
| } |
| |
| nfserr = ops->proc_layoutcommit(inode, lcp); |
| nfs4_put_stid(&ls->ls_stid); |
| out: |
| return nfserr; |
| } |
| |
| static __be32 |
| nfsd4_layoutreturn(struct svc_rqst *rqstp, |
| struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) |
| { |
| struct nfsd4_layoutreturn *lrp = &u->layoutreturn; |
| struct svc_fh *current_fh = &cstate->current_fh; |
| __be32 nfserr; |
| |
| nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); |
| if (nfserr) |
| goto out; |
| |
| nfserr = nfserr_layoutunavailable; |
| if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) |
| goto out; |
| |
| switch (lrp->lr_seg.iomode) { |
| case IOMODE_READ: |
| case IOMODE_RW: |
| case IOMODE_ANY: |
| break; |
| default: |
| dprintk("%s: invalid iomode %d\n", __func__, |
| lrp->lr_seg.iomode); |
| nfserr = nfserr_inval; |
| goto out; |
| } |
| |
| switch (lrp->lr_return_type) { |
| case RETURN_FILE: |
| nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); |
| break; |
| case RETURN_FSID: |
| case RETURN_ALL: |
| nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); |
| break; |
| default: |
| dprintk("%s: invalid return_type %d\n", __func__, |
| lrp->lr_return_type); |
| nfserr = nfserr_inval; |
| break; |
| } |
| out: |
| return nfserr; |
| } |
| #endif /* CONFIG_NFSD_PNFS */ |
| |
| static __be32 |
| nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_getxattr *getxattr = &u->getxattr; |
| |
| return nfsd_getxattr(rqstp, &cstate->current_fh, |
| getxattr->getxa_name, &getxattr->getxa_buf, |
| &getxattr->getxa_len); |
| } |
| |
| static __be32 |
| nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_setxattr *setxattr = &u->setxattr; |
| __be32 ret; |
| |
| if (opens_in_grace(SVC_NET(rqstp))) |
| return nfserr_grace; |
| |
| ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name, |
| setxattr->setxa_buf, setxattr->setxa_len, |
| setxattr->setxa_flags); |
| |
| if (!ret) |
| set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh); |
| |
| return ret; |
| } |
| |
| static __be32 |
| nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| /* |
| * Get the entire list, then copy out only the user attributes |
| * in the encode function. |
| */ |
| return nfsd_listxattr(rqstp, &cstate->current_fh, |
| &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len); |
| } |
| |
| static __be32 |
| nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| union nfsd4_op_u *u) |
| { |
| struct nfsd4_removexattr *removexattr = &u->removexattr; |
| __be32 ret; |
| |
| if (opens_in_grace(SVC_NET(rqstp))) |
| return nfserr_grace; |
| |
| ret = nfsd_removexattr(rqstp, &cstate->current_fh, |
| removexattr->rmxa_name); |
| |
| if (!ret) |
| set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh); |
| |
| return ret; |
| } |
| |
| /* |
| * NULL call. |
| */ |
| static __be32 |
| nfsd4_proc_null(struct svc_rqst *rqstp) |
| { |
| return rpc_success; |
| } |
| |
| static inline void nfsd4_increment_op_stats(u32 opnum) |
| { |
| if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) |
| percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]); |
| } |
| |
| static const 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 *first_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 (first_op->status == nfserr_op_illegal) |
| return nfs_ok; |
| if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) |
| return nfserr_op_not_in_session; |
| if (first_op->opnum == OP_SEQUENCE) |
| return nfs_ok; |
| /* |
| * So first_op is something allowed outside a session, like |
| * EXCHANGE_ID; but then it has to be the only op in the |
| * compound: |
| */ |
| if (args->opcnt != 1) |
| return nfserr_not_only_op; |
| return nfs_ok; |
| } |
| |
| const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) |
| { |
| return &nfsd4_ops[op->opnum]; |
| } |
| |
| bool nfsd4_cache_this_op(struct nfsd4_op *op) |
| { |
| if (op->opnum == OP_ILLEGAL) |
| return false; |
| return OPDESC(op)->op_flags & OP_CACHEME; |
| } |
| |
| static bool need_wrongsec_check(struct svc_rqst *rqstp) |
| { |
| struct nfsd4_compoundres *resp = rqstp->rq_resp; |
| struct nfsd4_compoundargs *argp = rqstp->rq_argp; |
| struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; |
| struct nfsd4_op *next = &argp->ops[resp->opcnt]; |
| const struct nfsd4_operation *thisd = OPDESC(this); |
| const struct nfsd4_operation *nextd; |
| |
| /* |
| * 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; |
| if (next->opnum == OP_ILLEGAL) |
| 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); |
| } |
| |
| #ifdef CONFIG_NFSD_V4_2_INTER_SSC |
| static void |
| check_if_stalefh_allowed(struct nfsd4_compoundargs *args) |
| { |
| struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL; |
| struct nfsd4_copy *copy; |
| struct nfsd4_putfh *putfh; |
| int i; |
| |
| /* traverse all operation and if it's a COPY compound, mark the |
| * source filehandle to skip verification |
| */ |
| for (i = 0; i < args->opcnt; i++) { |
| op = &args->ops[i]; |
| if (op->opnum == OP_PUTFH) |
| current_op = op; |
| else if (op->opnum == OP_SAVEFH) |
| saved_op = current_op; |
| else if (op->opnum == OP_RESTOREFH) |
| current_op = saved_op; |
| else if (op->opnum == OP_COPY) { |
| copy = (struct nfsd4_copy *)&op->u; |
| if (!saved_op) { |
| op->status = nfserr_nofilehandle; |
| return; |
| } |
| putfh = (struct nfsd4_putfh *)&saved_op->u; |
| if (!copy->cp_intra) |
| putfh->no_verify = true; |
| } |
| } |
| } |
| #else |
| static void |
| check_if_stalefh_allowed(struct nfsd4_compoundargs *args) |
| { |
| } |
| #endif |
| |
| /* |
| * COMPOUND call. |
| */ |
| static __be32 |
| nfsd4_proc_compound(struct svc_rqst *rqstp) |
| { |
| struct nfsd4_compoundargs *args = rqstp->rq_argp; |
| struct nfsd4_compoundres *resp = rqstp->rq_resp; |
| struct nfsd4_op *op; |
| struct nfsd4_compound_state *cstate = &resp->cstate; |
| struct svc_fh *current_fh = &cstate->current_fh; |
| struct svc_fh *save_fh = &cstate->save_fh; |
| struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| __be32 status; |
| |
| resp->xdr = &rqstp->rq_res_stream; |
| resp->statusp = resp->xdr->p; |
| |
| /* reserve space for: NFS status code */ |
| xdr_reserve_space(resp->xdr, XDR_UNIT); |
| |
| /* reserve space for: taglen, tag, and opcnt */ |
| xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen); |
| resp->taglen = args->taglen; |
| resp->tag = args->tag; |
| resp->rqstp = rqstp; |
| cstate->minorversion = args->minorversion; |
| fh_init(current_fh, NFS4_FHSIZE); |
| fh_init(save_fh, NFS4_FHSIZE); |
| /* |
| * Don't use the deferral mechanism for NFSv4; compounds make it |
| * too hard to avoid non-idempotency problems. |
| */ |
| clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); |
| |
| /* |
| * According to RFC3010, this takes precedence over all other errors. |
| */ |
| status = nfserr_minor_vers_mismatch; |
| if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0) |
| goto out; |
| status = nfserr_resource; |
| if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND) |
| goto out; |
| |
| status = nfs41_check_op_ordering(args); |
| if (status) { |
| op = &args->ops[0]; |
| op->status = status; |
| resp->opcnt = 1; |
| goto encode_op; |
| } |
| check_if_stalefh_allowed(args); |
| |
| rqstp->rq_lease_breaker = (void **)&cstate->clp; |
| |
| trace_nfsd_compound(rqstp, args->opcnt); |
| while (!status && resp->opcnt < args->opcnt) { |
| op = &args->ops[resp->opcnt++]; |
| |
| /* |
| * The XDR decode routines may have pre-set op->status; |
| * for example, if there is a miscellaneous XDR error |
| * it will be set to nfserr_bad_xdr. |
| */ |
| if (op->status) { |
| if (op->opnum == OP_OPEN) |
| op->status = nfsd4_open_omfg(rqstp, cstate, op); |
| goto encode_op; |
| } |
| if (!current_fh->fh_dentry && |
| !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { |
| if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { |
| op->status = nfserr_nofilehandle; |
| goto encode_op; |
| } |
| } else if (current_fh->fh_export && |
| current_fh->fh_export->ex_fslocs.migrated && |
| !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { |
| op->status = nfserr_moved; |
| goto encode_op; |
| } |
| |
| fh_clear_wcc(current_fh); |
| |
| /* If op is non-idempotent */ |
| if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { |
| /* |
| * Don't execute this op if we couldn't encode a |
| * succesful reply: |
| */ |
| u32 plen = op->opdesc->op_rsize_bop(rqstp, op); |
| /* |
| * Plus if there's another operation, make sure |
| * we'll have space to at least encode an error: |
| */ |
| if (resp->opcnt < args->opcnt) |
| plen += COMPOUND_ERR_SLACK_SPACE; |
| op->status = nfsd4_check_resp_size(resp, plen); |
| } |
| |
| if (op->status) |
| goto encode_op; |
| |
| if (op->opdesc->op_get_currentstateid) |
| op->opdesc->op_get_currentstateid(cstate, &op->u); |
| op->status = op->opdesc->op_func(rqstp, cstate, &op->u); |
| |
| /* Only from SEQUENCE */ |
| if (cstate->status == nfserr_replay_cache) { |
| dprintk("%s NFS4.1 replay from cache\n", __func__); |
| status = op->status; |
| goto out; |
| } |
| if (!op->status) { |
| if (op->opdesc->op_set_currentstateid) |
| op->opdesc->op_set_currentstateid(cstate, &op->u); |
| |
| if (op->opdesc->op_flags & OP_CLEAR_STATEID) |
| clear_current_stateid(cstate); |
| |
| if (current_fh->fh_export && |
| need_wrongsec_check(rqstp)) |
| op->status = check_nfsd_access(current_fh->fh_export, rqstp); |
| } |
| encode_op: |
| if (op->status == nfserr_replay_me) { |
| op->replay = &cstate->replay_owner->so_replay; |
| nfsd4_encode_replay(resp->xdr, op); |
| status = op->status = op->replay->rp_status; |
| } else { |
| nfsd4_encode_operation(resp, op); |
| status = op->status; |
| } |
| |
| trace_nfsd_compound_status(args->opcnt, resp->opcnt, status, |
| nfsd4_op_name(op->opnum)); |
| |
| nfsd4_cstate_clear_replay(cstate); |
| nfsd4_increment_op_stats(op->opnum); |
| } |
| |
| fh_put(current_fh); |
| fh_put(save_fh); |
| BUG_ON(cstate->replay_owner); |
| out: |
| cstate->status = status; |
| /* Reset deferral mechanism for RPC deferrals */ |
| set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); |
| return rpc_success; |
| } |
| |
| #define op_encode_hdr_size (2) |
| #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) |
| #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) |
| #define op_encode_change_info_maxsz (5) |
| #define nfs4_fattr_bitmap_maxsz (4) |
| |
| /* We'll fall back on returning no lockowner if run out of space: */ |
| #define op_encode_lockowner_maxsz (0) |
| #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) |
| |
| #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) |
| |
| #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) |
| #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ |
| op_encode_ace_maxsz) |
| |
| #define op_encode_channel_attrs_maxsz (6 + 1 + 1) |
| |
| static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| /* ac_supported, ac_resp_access */ |
| return (op_encode_hdr_size + 2)* sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + op_encode_change_info_maxsz |
| + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); |
| } |
| |
| /* |
| * Note since this is an idempotent operation we won't insist on failing |
| * the op prematurely if the estimate is too large. We may turn off splice |
| * reads unnecessarily. |
| */ |
| static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, |
| struct nfsd4_op *op) |
| { |
| u32 *bmap = op->u.getattr.ga_bmval; |
| u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; |
| u32 ret = 0; |
| |
| if (bmap0 & FATTR4_WORD0_ACL) |
| return svc_max_payload(rqstp); |
| if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) |
| return svc_max_payload(rqstp); |
| |
| if (bmap1 & FATTR4_WORD1_OWNER) { |
| ret += IDMAP_NAMESZ + 4; |
| bmap1 &= ~FATTR4_WORD1_OWNER; |
| } |
| if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { |
| ret += IDMAP_NAMESZ + 4; |
| bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; |
| } |
| if (bmap0 & FATTR4_WORD0_FILEHANDLE) { |
| ret += NFS4_FHSIZE + 4; |
| bmap0 &= ~FATTR4_WORD0_FILEHANDLE; |
| } |
| if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { |
| ret += NFS4_MAXLABELLEN + 12; |
| bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; |
| } |
| /* |
| * Largest of remaining attributes are 16 bytes (e.g., |
| * supported_attributes) |
| */ |
| ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); |
| /* bitmask, length */ |
| ret += 20; |
| return ret; |
| } |
| |
| static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; |
| } |
| |
| static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + op_encode_change_info_maxsz) |
| * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + op_encode_lock_denied_maxsz) |
| * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + op_encode_stateid_maxsz |
| + op_encode_change_info_maxsz + 1 |
| + nfs4_fattr_bitmap_maxsz |
| + op_encode_delegation_maxsz) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| u32 maxcount = 0, rlen = 0; |
| |
| maxcount = svc_max_payload(rqstp); |
| rlen = min(op->u.read.rd_length, maxcount); |
| |
| return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| u32 maxcount = svc_max_payload(rqstp); |
| u32 rlen = min(op->u.read.rd_length, maxcount); |
| /* |
| * If we detect that the file changed during hole encoding, then we |
| * recover by encoding the remaining reply as data. This means we need |
| * to set aside enough room to encode two data segments. |
| */ |
| u32 seg_len = 2 * (1 + 2 + 1); |
| |
| return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| u32 maxcount = 0, rlen = 0; |
| |
| maxcount = svc_max_payload(rqstp); |
| rlen = min(op->u.readdir.rd_maxcount, maxcount); |
| |
| return (op_encode_hdr_size + op_encode_verifier_maxsz + |
| XDR_QUADLEN(rlen)) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; |
| } |
| |
| static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + op_encode_change_info_maxsz) |
| * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + op_encode_change_info_maxsz |
| + op_encode_change_info_maxsz) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, |
| struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size |
| + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) |
| * 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_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * |
| (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * |
| sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ |
| 1 + 1 + /* eir_flags, spr_how */\ |
| 4 + /* spo_must_enforce & _allow with bitmap */\ |
| 2 + /*eir_server_owner.so_minor_id */\ |
| /* eir_server_owner.so_major_id<> */\ |
| XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ |
| /* eir_server_scope<> */\ |
| XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ |
| 1 + /* eir_server_impl_id array length */\ |
| 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + \ |
| XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ |
| 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + \ |
| XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ |
| 2 + /* csr_sequence, csr_flags */\ |
| op_encode_channel_attrs_maxsz + \ |
| op_encode_channel_attrs_maxsz) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + |
| 1 /* wr_callback */ + |
| op_encode_stateid_maxsz /* wr_callback */ + |
| 2 /* wr_count */ + |
| 1 /* wr_committed */ + |
| op_encode_verifier_maxsz + |
| 1 /* cr_consecutive */ + |
| 1 /* cr_synchronous */) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp, |
| struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + |
| 2 /* osr_count */ + |
| 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp, |
| struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + |
| 3 /* cnr_lease_time */ + |
| 1 /* We support one cnr_source_server */ + |
| 1 /* cnr_stateid seq */ + |
| op_encode_stateid_maxsz /* cnr_stateid */ + |
| 1 /* num cnr_source_server*/ + |
| 1 /* nl4_type */ + |
| 1 /* nl4 size */ + |
| XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */) |
| * sizeof(__be32); |
| } |
| |
| #ifdef CONFIG_NFSD_PNFS |
| static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| u32 maxcount = 0, rlen = 0; |
| |
| maxcount = svc_max_payload(rqstp); |
| rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); |
| |
| return (op_encode_hdr_size + |
| 1 /* gd_layout_type*/ + |
| XDR_QUADLEN(rlen) + |
| 2 /* gd_notify_types */) * sizeof(__be32); |
| } |
| |
| /* |
| * At this stage we don't really know what layout driver will handle the request, |
| * so we need to define an arbitrary upper bound here. |
| */ |
| #define MAX_LAYOUT_SIZE 128 |
| static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + |
| 1 /* logr_return_on_close */ + |
| op_encode_stateid_maxsz + |
| 1 /* nr of layouts */ + |
| MAX_LAYOUT_SIZE) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + |
| 1 /* locr_newsize */ + |
| 2 /* ns_size */) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + |
| 1 /* lrs_stateid */ + |
| op_encode_stateid_maxsz) * sizeof(__be32); |
| } |
| #endif /* CONFIG_NFSD_PNFS */ |
| |
| |
| static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + 3) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp, |
| struct nfsd4_op *op) |
| { |
| u32 maxcount, rlen; |
| |
| maxcount = svc_max_payload(rqstp); |
| rlen = min_t(u32, XATTR_SIZE_MAX, maxcount); |
| |
| return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_setxattr_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_listxattrs_rsize(struct svc_rqst *rqstp, |
| struct nfsd4_op *op) |
| { |
| u32 maxcount, rlen; |
| |
| maxcount = svc_max_payload(rqstp); |
| rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount); |
| |
| return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32); |
| } |
| |
| static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp, |
| struct nfsd4_op *op) |
| { |
| return (op_encode_hdr_size + op_encode_change_info_maxsz) |
| * sizeof(__be32); |
| } |
| |
| |
| static const struct nfsd4_operation nfsd4_ops[] = { |
| [OP_ACCESS] = { |
| .op_func = nfsd4_access, |
| .op_name = "OP_ACCESS", |
| .op_rsize_bop = nfsd4_access_rsize, |
| }, |
| [OP_CLOSE] = { |
| .op_func = nfsd4_close, |
| .op_flags = OP_MODIFIES_SOMETHING, |
| .op_name = "OP_CLOSE", |
| .op_rsize_bop = nfsd4_status_stateid_rsize, |
| .op_get_currentstateid = nfsd4_get_closestateid, |
| .op_set_currentstateid = nfsd4_set_closestateid, |
| }, |
| [OP_COMMIT] = { |
| .op_func = nfsd4_commit, |
| .op_flags = OP_MODIFIES_SOMETHING, |
| .op_name = "OP_COMMIT", |
| .op_rsize_bop = nfsd4_commit_rsize, |
| }, |
| [OP_CREATE] = { |
| .op_func = nfsd4_create, |
| .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, |
| .op_name = "OP_CREATE", |
| .op_rsize_bop = nfsd4_create_rsize, |
| }, |
| [OP_DELEGRETURN] = { |
| .op_func = nfsd4_delegreturn, |
| .op_flags = OP_MODIFIES_SOMETHING, |
| .op_name = "OP_DELEGRETURN", |
| .op_rsize_bop = nfsd4_only_status_rsize, |
| .op_get_currentstateid = nfsd4_get_delegreturnstateid, |
| }, |
| [OP_GETATTR] = { |
| .op_func = nfsd4_getattr, |
| .op_flags = ALLOWED_ON_ABSENT_FS, |
| .op_rsize_bop = nfsd4_getattr_rsize, |
| .op_name = "OP_GETATTR", |
| }, |
| [OP_GETFH] = { |
| .op_func = nfsd4_getfh, |
| .op_name = "OP_GETFH", |
| .op_rsize_bop = nfsd4_getfh_rsize, |
| }, |
| [OP_LINK] = { |
| .op_func = nfsd4_link, |
| .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING |
| | OP_CACHEME, |
| .op_name = "OP_LINK", |
| . |