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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:54:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:54:33 -0700 |
| commit | a87e84b5cdfacf11af4e8a85c4bca9793658536f (patch) | |
| tree | f8e3cb2d339d8ed0e987d55f725e501730cdc81d | |
| parent | 342ff1a1b558ebbdb8cbd55ab6a63eca8b2473ca (diff) | |
| parent | 3c394ddaa7ea4205f933fd9b481166b2669368a9 (diff) | |
| download | linux-0-day-a87e84b5cdfacf11af4e8a85c4bca9793658536f.tar.gz linux-0-day-a87e84b5cdfacf11af4e8a85c4bca9793658536f.tar.xz | |
Merge branch 'for-2.6.32' of git://linux-nfs.org/~bfields/linux
* 'for-2.6.32' of git://linux-nfs.org/~bfields/linux: (68 commits)
nfsd4: nfsv4 clients should cross mountpoints
nfsd: revise 4.1 status documentation
sunrpc/cache: avoid variable over-loading in cache_defer_req
sunrpc/cache: use list_del_init for the list_head entries in cache_deferred_req
nfsd: return success for non-NFS4 nfs4_state_start
nfsd41: Refactor create_client()
nfsd41: modify nfsd4.1 backchannel to use new xprt class
nfsd41: Backchannel: Implement cb_recall over NFSv4.1
nfsd41: Backchannel: cb_sequence callback
nfsd41: Backchannel: Setup sequence information
nfsd41: Backchannel: Server backchannel RPC wait queue
nfsd41: Backchannel: Add sequence arguments to callback RPC arguments
nfsd41: Backchannel: callback infrastructure
nfsd4: use common rpc_cred for all callbacks
nfsd4: allow nfs4 state startup to fail
SUNRPC: Defer the auth_gss upcall when the RPC call is asynchronous
nfsd4: fix null dereference creating nfsv4 callback client
nfsd4: fix whitespace in NFSPROC4_CLNT_CB_NULL definition
nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel
sunrpc/cache: simplify cache_fresh_locked and cache_fresh_unlocked.
...
42 files changed, 1640 insertions, 897 deletions
diff --git a/Documentation/filesystems/nfs41-server.txt b/Documentation/filesystems/nfs41-server.txt index 05d81cbcb2e17..5920fe26e6ff5 100644 --- a/Documentation/filesystems/nfs41-server.txt +++ b/Documentation/filesystems/nfs41-server.txt @@ -11,6 +11,11 @@ the /proc/fs/nfsd/versions control file. Note that to write this control file, the nfsd service must be taken down. Use your user-mode nfs-utils to set this up; see rpc.nfsd(8) +(Warning: older servers will interpret "+4.1" and "-4.1" as "+4" and +"-4", respectively. Therefore, code meant to work on both new and old +kernels must turn 4.1 on or off *before* turning support for version 4 +on or off; rpc.nfsd does this correctly.) + The NFSv4 minorversion 1 (NFSv4.1) implementation in nfsd is based on the latest NFSv4.1 Internet Draft: http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-29 @@ -25,6 +30,49 @@ are still under development out of tree. See http://wiki.linux-nfs.org/wiki/index.php/PNFS_prototype_design for more information. +The current implementation is intended for developers only: while it +does support ordinary file operations on clients we have tested against +(including the linux client), it is incomplete in ways which may limit +features unexpectedly, cause known bugs in rare cases, or cause +interoperability problems with future clients. Known issues: + + - gss support is questionable: currently mounts with kerberos + from a linux client are possible, but we aren't really + conformant with the spec (for example, we don't use kerberos + on the backchannel correctly). + - no trunking support: no clients currently take advantage of + trunking, but this is a mandatory failure, and its use is + recommended to clients in a number of places. (E.g. to ensure + timely renewal in case an existing connection's retry timeouts + have gotten too long; see section 8.3 of the draft.) + Therefore, lack of this feature may cause future clients to + fail. + - Incomplete backchannel support: incomplete backchannel gss + support and no support for BACKCHANNEL_CTL mean that + callbacks (hence delegations and layouts) may not be + available and clients confused by the incomplete + implementation may fail. + - Server reboot recovery is unsupported; if the server reboots, + clients may fail. + - We do not support SSV, which provides security for shared + client-server state (thus preventing unauthorized tampering + with locks and opens, for example). It is mandatory for + servers to support this, though no clients use it yet. + - Mandatory operations which we do not support, such as + DESTROY_CLIENTID, FREE_STATEID, SECINFO_NO_NAME, and + TEST_STATEID, are not currently used by clients, but will be + (and the spec recommends their uses in common cases), and + clients should not be expected to know how to recover from the + case where they are not supported. This will eventually cause + interoperability failures. + +In addition, some limitations are inherited from the current NFSv4 +implementation: + + - Incomplete delegation enforcement: if a file is renamed or + unlinked, a client holding a delegation may continue to + indefinitely allow opens of the file under the old name. + The table below, taken from the NFSv4.1 document, lists the operations that are mandatory to implement (REQ), optional (OPT), and NFSv4.0 operations that are required not to implement (MNI) @@ -142,6 +190,12 @@ NS*| CB_WANTS_CANCELLED | OPT | FDELG, | Section 20.10 | Implementation notes: +DELEGPURGE: +* mandatory only for servers that support CLAIM_DELEGATE_PREV and/or + CLAIM_DELEG_PREV_FH (which allows clients to keep delegations that + persist across client reboots). Thus we need not implement this for + now. + EXCHANGE_ID: * only SP4_NONE state protection supported * implementation ids are ignored diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c index 1f3b0fc0d351d..fc9032dc8862d 100644 --- a/fs/lockd/clntlock.c +++ b/fs/lockd/clntlock.c @@ -166,7 +166,7 @@ __be32 nlmclnt_grant(const struct sockaddr *addr, const struct nlm_lock *lock) */ if (fl_blocked->fl_u.nfs_fl.owner->pid != lock->svid) continue; - if (!nlm_cmp_addr(nlm_addr(block->b_host), addr)) + if (!rpc_cmp_addr(nlm_addr(block->b_host), addr)) continue; if (nfs_compare_fh(NFS_FH(fl_blocked->fl_file->f_path.dentry->d_inode) ,fh) != 0) continue; diff --git a/fs/lockd/host.c b/fs/lockd/host.c index 7cb076ac6b453..4600c2037b8bb 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -111,7 +111,7 @@ static struct nlm_host *nlm_lookup_host(struct nlm_lookup_host_info *ni) */ chain = &nlm_hosts[nlm_hash_address(ni->sap)]; hlist_for_each_entry(host, pos, chain, h_hash) { - if (!nlm_cmp_addr(nlm_addr(host), ni->sap)) + if (!rpc_cmp_addr(nlm_addr(host), ni->sap)) continue; /* See if we have an NSM handle for this client */ @@ -125,7 +125,7 @@ static struct nlm_host *nlm_lookup_host(struct nlm_lookup_host_info *ni) if (host->h_server != ni->server) continue; if (ni->server && - !nlm_cmp_addr(nlm_srcaddr(host), ni->src_sap)) + !rpc_cmp_addr(nlm_srcaddr(host), ni->src_sap)) continue; /* Move to head of hash chain. */ diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c index 30c933188dd79..f956651d0f651 100644 --- a/fs/lockd/mon.c +++ b/fs/lockd/mon.c @@ -209,7 +209,7 @@ static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap) struct nsm_handle *nsm; list_for_each_entry(nsm, &nsm_handles, sm_link) - if (nlm_cmp_addr(nsm_addr(nsm), sap)) + if (rpc_cmp_addr(nsm_addr(nsm), sap)) return nsm; return NULL; } diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c index 9e4d6aab611b8..ad478da7ca631 100644 --- a/fs/lockd/svcsubs.c +++ b/fs/lockd/svcsubs.c @@ -417,7 +417,7 @@ EXPORT_SYMBOL_GPL(nlmsvc_unlock_all_by_sb); static int nlmsvc_match_ip(void *datap, struct nlm_host *host) { - return nlm_cmp_addr(nlm_srcaddr(host), datap); + return rpc_cmp_addr(nlm_srcaddr(host), datap); } /** diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c index d9462643155cc..984a5ebcc1d68 100644 --- a/fs/nfsd/export.c +++ b/fs/nfsd/export.c @@ -1341,6 +1341,8 @@ exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp) if (rv) goto out; rv = check_nfsd_access(exp, rqstp); + if (rv) + fh_put(fhp); out: exp_put(exp); return rv; diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c index 01d4ec1c88e0f..edf926e1062f8 100644 --- a/fs/nfsd/nfs3xdr.c +++ b/fs/nfsd/nfs3xdr.c @@ -814,17 +814,6 @@ encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, return p; } -static __be32 * -encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, - struct svc_fh *fhp) -{ - p = encode_post_op_attr(cd->rqstp, p, fhp); - *p++ = xdr_one; /* yes, a file handle follows */ - p = encode_fh(p, fhp); - fh_put(fhp); - return p; -} - static int compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, const char *name, int namlen) @@ -836,29 +825,54 @@ compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, dparent = cd->fh.fh_dentry; exp = cd->fh.fh_export; - fh_init(fhp, NFS3_FHSIZE); if (isdotent(name, namlen)) { if (namlen == 2) { dchild = dget_parent(dparent); if (dchild == dparent) { /* filesystem root - cannot return filehandle for ".." */ dput(dchild); - return 1; + return -ENOENT; } } else dchild = dget(dparent); } else dchild = lookup_one_len(name, dparent, namlen); if (IS_ERR(dchild)) - return 1; - if (d_mountpoint(dchild) || - fh_compose(fhp, exp, dchild, &cd->fh) != 0 || - !dchild->d_inode) - rv = 1; + return -ENOENT; + rv = -ENOENT; + if (d_mountpoint(dchild)) + goto out; + rv = fh_compose(fhp, exp, dchild, &cd->fh); + if (rv) + goto out; + if (!dchild->d_inode) + goto out; + rv = 0; +out: dput(dchild); return rv; } +__be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen) +{ + struct svc_fh fh; + int err; + + fh_init(&fh, NFS3_FHSIZE); + err = compose_entry_fh(cd, &fh, name, namlen); + if (err) { + *p++ = 0; + *p++ = 0; + goto out; + } + p = encode_post_op_attr(cd->rqstp, p, &fh); + *p++ = xdr_one; /* yes, a file handle follows */ + p = encode_fh(p, &fh); +out: + fh_put(&fh); + return p; +} + /* * Encode a directory entry. This one works for both normal readdir * and readdirplus. @@ -929,16 +943,8 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen, p = encode_entry_baggage(cd, p, name, namlen, ino); - /* throw in readdirplus baggage */ - if (plus) { - struct svc_fh fh; - - if (compose_entry_fh(cd, &fh, name, namlen) > 0) { - *p++ = 0; - *p++ = 0; - } else - p = encode_entryplus_baggage(cd, p, &fh); - } + if (plus) + p = encode_entryplus_baggage(cd, p, name, namlen); num_entry_words = p - cd->buffer; } else if (cd->rqstp->rq_respages[pn+1] != NULL) { /* temporarily encode entry into next page, then move back to @@ -951,17 +957,8 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen, p1 = encode_entry_baggage(cd, p1, name, namlen, ino); - /* throw in readdirplus baggage */ - if (plus) { - struct svc_fh fh; - - if (compose_entry_fh(cd, &fh, name, namlen) > 0) { - /* zero out the filehandle */ - *p1++ = 0; - *p1++ = 0; - } else - p1 = encode_entryplus_baggage(cd, p1, &fh); - } + if (plus) + p = encode_entryplus_baggage(cd, p1, name, namlen); /* determine entry word length and lengths to go in pages */ num_entry_words = p1 - tmp; diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c index 54b8b4140c8f6..725d02f210e27 100644 --- a/fs/nfsd/nfs4acl.c +++ b/fs/nfsd/nfs4acl.c @@ -321,7 +321,7 @@ _posix_to_nfsv4_one(struct posix_acl *pacl, struct nfs4_acl *acl, deny = ~pas.group & pas.other; if (deny) { ace->type = NFS4_ACE_ACCESS_DENIED_ACE_TYPE; - ace->flag = eflag | NFS4_ACE_IDENTIFIER_GROUP; + ace->flag = eflag; ace->access_mask = deny_mask_from_posix(deny, flags); ace->whotype = NFS4_ACL_WHO_GROUP; ace++; @@ -335,7 +335,7 @@ _posix_to_nfsv4_one(struct posix_acl *pacl, struct nfs4_acl *acl, if (deny) { ace->type = NFS4_ACE_ACCESS_DENIED_ACE_TYPE; ace->flag = eflag | NFS4_ACE_IDENTIFIER_GROUP; - ace->access_mask = mask_from_posix(deny, flags); + ace->access_mask = deny_mask_from_posix(deny, flags); ace->whotype = NFS4_ACL_WHO_NAMED; ace->who = pa->e_id; ace++; diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 3fd23f7acecaf..24e8d78f8ddeb 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -43,25 +43,30 @@ #include <linux/sunrpc/xdr.h> #include <linux/sunrpc/svc.h> #include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/svcsock.h> #include <linux/nfsd/nfsd.h> #include <linux/nfsd/state.h> #include <linux/sunrpc/sched.h> #include <linux/nfs4.h> +#include <linux/sunrpc/xprtsock.h> #define NFSDDBG_FACILITY NFSDDBG_PROC #define NFSPROC4_CB_NULL 0 #define NFSPROC4_CB_COMPOUND 1 +#define NFS4_STATEID_SIZE 16 /* Index of predefined Linux callback client operations */ enum { - NFSPROC4_CLNT_CB_NULL = 0, + NFSPROC4_CLNT_CB_NULL = 0, NFSPROC4_CLNT_CB_RECALL, + NFSPROC4_CLNT_CB_SEQUENCE, }; enum nfs_cb_opnum4 { OP_CB_RECALL = 4, + OP_CB_SEQUENCE = 11, }; #define NFS4_MAXTAGLEN 20 @@ -70,17 +75,29 @@ enum nfs_cb_opnum4 { #define NFS4_dec_cb_null_sz 0 #define cb_compound_enc_hdr_sz 4 #define cb_compound_dec_hdr_sz (3 + (NFS4_MAXTAGLEN >> 2)) +#define sessionid_sz (NFS4_MAX_SESSIONID_LEN >> 2) +#define cb_sequence_enc_sz (sessionid_sz + 4 + \ + 1 /* no referring calls list yet */) +#define cb_sequence_dec_sz (op_dec_sz + sessionid_sz + 4) + #define op_enc_sz 1 #define op_dec_sz 2 #define enc_nfs4_fh_sz (1 + (NFS4_FHSIZE >> 2)) #define enc_stateid_sz (NFS4_STATEID_SIZE >> 2) #define NFS4_enc_cb_recall_sz (cb_compound_enc_hdr_sz + \ + cb_sequence_enc_sz + \ 1 + enc_stateid_sz + \ enc_nfs4_fh_sz) #define NFS4_dec_cb_recall_sz (cb_compound_dec_hdr_sz + \ + cb_sequence_dec_sz + \ op_dec_sz) +struct nfs4_rpc_args { + void *args_op; + struct nfsd4_cb_sequence args_seq; +}; + /* * Generic encode routines from fs/nfs/nfs4xdr.c */ @@ -137,11 +154,13 @@ xdr_error: \ } while (0) struct nfs4_cb_compound_hdr { - int status; - u32 ident; + /* args */ + u32 ident; /* minorversion 0 only */ u32 nops; __be32 *nops_p; u32 minorversion; + /* res */ + int status; u32 taglen; char *tag; }; @@ -238,6 +257,27 @@ encode_cb_recall(struct xdr_stream *xdr, struct nfs4_delegation *dp, hdr->nops++; } +static void +encode_cb_sequence(struct xdr_stream *xdr, struct nfsd4_cb_sequence *args, + struct nfs4_cb_compound_hdr *hdr) +{ + __be32 *p; + + if (hdr->minorversion == 0) + return; + + RESERVE_SPACE(1 + NFS4_MAX_SESSIONID_LEN + 20); + + WRITE32(OP_CB_SEQUENCE); + WRITEMEM(args->cbs_clp->cl_sessionid.data, NFS4_MAX_SESSIONID_LEN); + WRITE32(args->cbs_clp->cl_cb_seq_nr); + WRITE32(0); /* slotid, always 0 */ + WRITE32(0); /* highest slotid always 0 */ + WRITE32(0); /* cachethis always 0 */ + WRITE32(0); /* FIXME: support referring_call_lists */ + hdr->nops++; +} + static int nfs4_xdr_enc_cb_null(struct rpc_rqst *req, __be32 *p) { @@ -249,15 +289,19 @@ nfs4_xdr_enc_cb_null(struct rpc_rqst *req, __be32 *p) } static int -nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p, struct nfs4_delegation *args) +nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p, + struct nfs4_rpc_args *rpc_args) { struct xdr_stream xdr; + struct nfs4_delegation *args = rpc_args->args_op; struct nfs4_cb_compound_hdr hdr = { .ident = args->dl_ident, + .minorversion = rpc_args->args_seq.cbs_minorversion, }; xdr_init_encode(&xdr, &req->rq_snd_buf, p); encode_cb_compound_hdr(&xdr, &hdr); + encode_cb_sequence(&xdr, &rpc_args->args_seq, &hdr); encode_cb_recall(&xdr, args, &hdr); encode_cb_nops(&hdr); return 0; @@ -299,6 +343,57 @@ decode_cb_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected) return 0; } +/* + * Our current back channel implmentation supports a single backchannel + * with a single slot. + */ +static int +decode_cb_sequence(struct xdr_stream *xdr, struct nfsd4_cb_sequence *res, + struct rpc_rqst *rqstp) +{ + struct nfs4_sessionid id; + int status; + u32 dummy; + __be32 *p; + + if (res->cbs_minorversion == 0) + return 0; + + status = decode_cb_op_hdr(xdr, OP_CB_SEQUENCE); + if (status) + return status; + + /* + * If the server returns different values for sessionID, slotID or + * sequence number, the server is looney tunes. + */ + status = -ESERVERFAULT; + + READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); + memcpy(id.data, p, NFS4_MAX_SESSIONID_LEN); + p += XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN); + if (memcmp(id.data, res->cbs_clp->cl_sessionid.data, + NFS4_MAX_SESSIONID_LEN)) { + dprintk("%s Invalid session id\n", __func__); + goto out; + } + READ32(dummy); + if (dummy != res->cbs_clp->cl_cb_seq_nr) { + dprintk("%s Invalid sequence number\n", __func__); + goto out; + } + READ32(dummy); /* slotid must be 0 */ + if (dummy != 0) { + dprintk("%s Invalid slotid\n", __func__); + goto out; + } + /* FIXME: process highest slotid and target highest slotid */ + status = 0; +out: + return status; +} + + static int nfs4_xdr_dec_cb_null(struct rpc_rqst *req, __be32 *p) { @@ -306,7 +401,8 @@ nfs4_xdr_dec_cb_null(struct rpc_rqst *req, __be32 *p) } static int -nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, __be32 *p) +nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, __be32 *p, + struct nfsd4_cb_sequence *seq) { struct xdr_stream xdr; struct nfs4_cb_compound_hdr hdr; @@ -316,6 +412,11 @@ nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp, __be32 *p) status = decode_cb_compound_hdr(&xdr, &hdr); if (status) goto out; + if (seq) { + status = decode_cb_sequence(&xdr, seq, rqstp); + if (status) + goto out; + } status = decode_cb_op_hdr(&xdr, OP_CB_RECALL); out: return status; @@ -377,16 +478,15 @@ static int max_cb_time(void) int setup_callback_client(struct nfs4_client *clp) { - struct sockaddr_in addr; struct nfs4_cb_conn *cb = &clp->cl_cb_conn; struct rpc_timeout timeparms = { .to_initval = max_cb_time(), .to_retries = 0, }; struct rpc_create_args args = { - .protocol = IPPROTO_TCP, - .address = (struct sockaddr *)&addr, - .addrsize = sizeof(addr), + .protocol = XPRT_TRANSPORT_TCP, + .address = (struct sockaddr *) &cb->cb_addr, + .addrsize = cb->cb_addrlen, .timeout = &timeparms, .program = &cb_program, .prognumber = cb->cb_prog, @@ -399,13 +499,10 @@ int setup_callback_client(struct nfs4_client *clp) if (!clp->cl_principal && (clp->cl_flavor >= RPC_AUTH_GSS_KRB5)) return -EINVAL; - - /* Initialize address */ - memset(&addr, 0, sizeof(addr)); - addr.sin_family = AF_INET; - addr.sin_port = htons(cb->cb_port); - addr.sin_addr.s_addr = htonl(cb->cb_addr); - + if (cb->cb_minorversion) { + args.bc_xprt = clp->cl_cb_xprt; + args.protocol = XPRT_TRANSPORT_BC_TCP; + } /* Create RPC client */ client = rpc_create(&args); if (IS_ERR(client)) { @@ -439,42 +536,29 @@ static const struct rpc_call_ops nfsd4_cb_probe_ops = { .rpc_call_done = nfsd4_cb_probe_done, }; -static struct rpc_cred *lookup_cb_cred(struct nfs4_cb_conn *cb) -{ - struct auth_cred acred = { - .machine_cred = 1 - }; +static struct rpc_cred *callback_cred; - /* - * Note in the gss case this doesn't actually have to wait for a - * gss upcall (or any calls to the client); this just creates a - * non-uptodate cred which the rpc state machine will fill in with - * a refresh_upcall later. - */ - return rpcauth_lookup_credcache(cb->cb_client->cl_auth, &acred, - RPCAUTH_LOOKUP_NEW); +int set_callback_cred(void) +{ + callback_cred = rpc_lookup_machine_cred(); + if (!callback_cred) + return -ENOMEM; + return 0; } + void do_probe_callback(struct nfs4_client *clp) { struct nfs4_cb_conn *cb = &clp->cl_cb_conn; struct rpc_message msg = { .rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL], .rpc_argp = clp, + .rpc_cred = callback_cred }; - struct rpc_cred *cred; int status; - cred = lookup_cb_cred(cb); - if (IS_ERR(cred)) { - status = PTR_ERR(cred); - goto out; - } - cb->cb_cred = cred; - msg.rpc_cred = cb->cb_cred; status = rpc_call_async(cb->cb_client, &msg, RPC_TASK_SOFT, &nfsd4_cb_probe_ops, (void *)clp); -out: if (status) { warn_no_callback_path(clp, status); put_nfs4_client(clp); @@ -503,11 +587,95 @@ nfsd4_probe_callback(struct nfs4_client *clp) do_probe_callback(clp); } +/* + * There's currently a single callback channel slot. + * If the slot is available, then mark it busy. Otherwise, set the + * thread for sleeping on the callback RPC wait queue. + */ +static int nfsd41_cb_setup_sequence(struct nfs4_client *clp, + struct rpc_task *task) +{ + struct nfs4_rpc_args *args = task->tk_msg.rpc_argp; + u32 *ptr = (u32 *)clp->cl_sessionid.data; + int status = 0; + + dprintk("%s: %u:%u:%u:%u\n", __func__, + ptr[0], ptr[1], ptr[2], ptr[3]); + + if (test_and_set_bit(0, &clp->cl_cb_slot_busy) != 0) { + rpc_sleep_on(&clp->cl_cb_waitq, task, NULL); + dprintk("%s slot is busy\n", __func__); + status = -EAGAIN; + goto out; + } + + /* + * We'll need the clp during XDR encoding and decoding, + * and the sequence during decoding to verify the reply + */ + args->args_seq.cbs_clp = clp; + task->tk_msg.rpc_resp = &args->args_seq; + +out: + dprintk("%s status=%d\n", __func__, status); + return status; +} + +/* + * TODO: cb_sequence should support referring call lists, cachethis, multiple + * slots, and mark callback channel down on communication errors. + */ +static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata) +{ + struct nfs4_delegation *dp = calldata; + struct nfs4_client *clp = dp->dl_client; + struct nfs4_rpc_args *args = task->tk_msg.rpc_argp; + u32 minorversion = clp->cl_cb_conn.cb_minorversion; + int status = 0; + + args->args_seq.cbs_minorversion = minorversion; + if (minorversion) { + status = nfsd41_cb_setup_sequence(clp, task); + if (status) { + if (status != -EAGAIN) { + /* terminate rpc task */ + task->tk_status = status; + task->tk_action = NULL; + } + return; + } + } + rpc_call_start(task); +} + +static void nfsd4_cb_done(struct rpc_task *task, void *calldata) +{ + struct nfs4_delegation *dp = calldata; + struct nfs4_client *clp = dp->dl_client; + + dprintk("%s: minorversion=%d\n", __func__, + clp->cl_cb_conn.cb_minorversion); + + if (clp->cl_cb_conn.cb_minorversion) { + /* No need for lock, access serialized in nfsd4_cb_prepare */ + ++clp->cl_cb_seq_nr; + clear_bit(0, &clp->cl_cb_slot_busy); + rpc_wake_up_next(&clp->cl_cb_waitq); + dprintk("%s: freed slot, new seqid=%d\n", __func__, + clp->cl_cb_seq_nr); + + /* We're done looking into the sequence information */ + task->tk_msg.rpc_resp = NULL; + } +} + static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata) { struct nfs4_delegation *dp = calldata; struct nfs4_client *clp = dp->dl_client; + nfsd4_cb_done(task, calldata); + switch (task->tk_status) { case -EIO: /* Network partition? */ @@ -520,16 +688,19 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata) break; default: /* success, or error we can't handle */ - return; + goto done; } if (dp->dl_retries--) { rpc_delay(task, 2*HZ); task->tk_status = 0; rpc_restart_call(task); + return; } else { atomic_set(&clp->cl_cb_conn.cb_set, 0); warn_no_callback_path(clp, task->tk_status); } +done: + kfree(task->tk_msg.rpc_argp); } static void nfsd4_cb_recall_release(void *calldata) @@ -542,6 +713,7 @@ static void nfsd4_cb_recall_release(void *calldata) } static const struct rpc_call_ops nfsd4_cb_recall_ops = { + .rpc_call_prepare = nfsd4_cb_prepare, .rpc_call_done = nfsd4_cb_recall_done, .rpc_release = nfsd4_cb_recall_release, }; @@ -554,17 +726,24 @@ nfsd4_cb_recall(struct nfs4_delegation *dp) { struct nfs4_client *clp = dp->dl_client; struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client; + struct nfs4_rpc_args *args; struct rpc_message msg = { .rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL], - .rpc_argp = dp, - .rpc_cred = clp->cl_cb_conn.cb_cred + .rpc_cred = callback_cred }; - int status; + int status = -ENOMEM; + args = kzalloc(sizeof(*args), GFP_KERNEL); + if (!args) + goto out; + args->args_op = dp; + msg.rpc_argp = args; dp->dl_retries = 1; status = rpc_call_async(clnt, &msg, RPC_TASK_SOFT, &nfsd4_cb_recall_ops, dp); +out: if (status) { + kfree(args); put_nfs4_client(clp); nfs4_put_delegation(dp); } diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 7c8801769a3cf..bebc0c2e1b0a9 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -68,7 +68,6 @@ 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; /* * Check about attributes are supported by the NFSv4 server or not. @@ -80,17 +79,13 @@ check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, return nfserr_attrnotsupp; /* - * Check FATTR4_WORD0_ACL & FATTR4_WORD0_FS_LOCATIONS can be supported + * Check FATTR4_WORD0_ACL can be supported * in current environment or not. */ if (bmval[0] & FATTR4_WORD0_ACL) { if (!IS_POSIXACL(dentry->d_inode)) return nfserr_attrnotsupp; } - if (bmval[0] & FATTR4_WORD0_FS_LOCATIONS) { - if (exp->ex_fslocs.locations == NULL) - return nfserr_attrnotsupp; - } /* * According to spec, read-only attributes return ERR_INVAL. @@ -123,6 +118,35 @@ nfsd4_check_open_attributes(struct svc_rqst *rqstp, 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) { @@ -206,6 +230,9 @@ do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_o if (status) goto out; + if (is_create_with_attrs(open) && open->op_acl != NULL) + do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval); + set_change_info(&open->op_cinfo, current_fh); fh_dup2(current_fh, &resfh); @@ -536,12 +563,17 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 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); - } + if (status) + goto out; + + if (create->cr_acl != NULL) + do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, + create->cr_bmval); + fh_unlock(&cstate->current_fh); + set_change_info(&create->cr_cinfo, &cstate->current_fh); + fh_dup2(&cstate->current_fh, &resfh); +out: fh_put(&resfh); return status; } @@ -947,34 +979,6 @@ static struct nfsd4_operation nfsd4_ops[]; static const char *nfsd4_op_name(unsigned opnum); /* - * This is a replay of a compound for which no cache entry pages - * were used. Encode the sequence operation, and if cachethis is FALSE - * encode the uncache rep error on the next operation. - */ -static __be32 -nfsd4_enc_uncached_replay(struct nfsd4_compoundargs *args, - struct nfsd4_compoundres *resp) -{ - struct nfsd4_op *op; - - dprintk("--> %s resp->opcnt %d ce_cachethis %u \n", __func__, - resp->opcnt, resp->cstate.slot->sl_cache_entry.ce_cachethis); - - /* Encode the replayed sequence operation */ - BUG_ON(resp->opcnt != 1); - op = &args->ops[resp->opcnt - 1]; - nfsd4_encode_operation(resp, op); - - /*return nfserr_retry_uncached_rep in next operation. */ - if (resp->cstate.slot->sl_cache_entry.ce_cachethis == 0) { - op = &args->ops[resp->opcnt++]; - op->status = nfserr_retry_uncached_rep; - nfsd4_encode_operation(resp, op); - } - return op->status; -} - -/* * Enforce NFSv4.1 COMPOUND ordering rules. * * TODO: @@ -1083,13 +1087,10 @@ nfsd4_proc_compound(struct svc_rqst *rqstp, BUG_ON(op->status == nfs_ok); encode_op: - /* Only from SEQUENCE or CREATE_SESSION */ + /* Only from SEQUENCE */ if (resp->cstate.status == nfserr_replay_cache) { dprintk("%s NFS4.1 replay from cache\n", __func__); - if (nfsd4_not_cached(resp)) - status = nfsd4_enc_uncached_replay(args, resp); - else - status = op->status; + status = op->status; goto out; } if (op->status == nfserr_replay_me) { diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 766d3d5445447..2153f9bdbebdc 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -55,6 +55,7 @@ #include <linux/lockd/bind.h> #include <linux/module.h> #include <linux/sunrpc/svcauth_gss.h> +#include <linux/sunrpc/clnt.h> #define NFSDDBG_FACILITY NFSDDBG_PROC @@ -413,36 +414,65 @@ gen_sessionid(struct nfsd4_session *ses) } /* - * Give the client the number of slots it requests bound by - * NFSD_MAX_SLOTS_PER_SESSION and by sv_drc_max_pages. + * The protocol defines ca_maxresponssize_cached to include the size of + * the rpc header, but all we need to cache is the data starting after + * the end of the initial SEQUENCE operation--the rest we regenerate + * each time. Therefore we can advertise a ca_maxresponssize_cached + * value that is the number of bytes in our cache plus a few additional + * bytes. In order to stay on the safe side, and not promise more than + * we can cache, those additional bytes must be the minimum possible: 24 + * bytes of rpc header (xid through accept state, with AUTH_NULL + * verifier), 12 for the compound header (with zero-length tag), and 44 + * for the SEQUENCE op response: + */ +#define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) + +/* + * Give the client the number of ca_maxresponsesize_cached slots it + * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, + * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more + * than NFSD_MAX_SLOTS_PER_SESSION. * - * If we run out of pages (sv_drc_pages_used == sv_drc_max_pages) we - * should (up to a point) re-negotiate active sessions and reduce their - * slot usage to make rooom for new connections. For now we just fail the - * create session. + * If we run out of reserved DRC memory we should (up to a point) + * re-negotiate active sessions and reduce their slot usage to make + * rooom for new connections. For now we just fail the create session. */ -static int set_forechannel_maxreqs(struct nfsd4_channel_attrs *fchan) +static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) { - int status = 0, np = fchan->maxreqs * NFSD_PAGES_PER_SLOT; + int mem, size = fchan->maxresp_cached; if (fchan->maxreqs < 1) return nfserr_inval; - else if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) - fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; - spin_lock(&nfsd_serv->sv_lock); - if (np + nfsd_serv->sv_drc_pages_used > nfsd_serv->sv_drc_max_pages) - np = nfsd_serv->sv_drc_max_pages - nfsd_serv->sv_drc_pages_used; - nfsd_serv->sv_drc_pages_used += np; - spin_unlock(&nfsd_serv->sv_lock); + if (size < NFSD_MIN_HDR_SEQ_SZ) + size = NFSD_MIN_HDR_SEQ_SZ; + size -= NFSD_MIN_HDR_SEQ_SZ; + if (size > NFSD_SLOT_CACHE_SIZE) + size = NFSD_SLOT_CACHE_SIZE; + + /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ + mem = fchan->maxreqs * size; + if (mem > NFSD_MAX_MEM_PER_SESSION) { + fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; + if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) + fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; + mem = fchan->maxreqs * size; + } - if (np <= 0) { - status = nfserr_resource; - fchan->maxreqs = 0; - } else - fchan->maxreqs = np / NFSD_PAGES_PER_SLOT; + spin_lock(&nfsd_drc_lock); + /* bound the total session drc memory ussage */ + if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { + fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; + mem = fchan->maxreqs * size; + } + nfsd_drc_mem_used += mem; + spin_unlock(&nfsd_drc_lock); - return status; + if (fchan->maxreqs == 0) + return nfserr_serverfault; + + fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; + return 0; } /* @@ -466,36 +496,41 @@ static int init_forechannel_attrs(struct svc_rqst *rqstp, fchan->maxresp_sz = maxcount; session_fchan->maxresp_sz = fchan->maxresp_sz; - /* Set the max response cached size our default which is - * a multiple of PAGE_SIZE and small */ - session_fchan->maxresp_cached = NFSD_PAGES_PER_SLOT * PAGE_SIZE; - fchan->maxresp_cached = session_fchan->maxresp_cached; - /* Use the client's maxops if possible */ if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; session_fchan->maxops = fchan->maxops; - /* try to use the client requested number of slots */ - if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) - fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; - /* FIXME: Error means no more DRC pages so the server should * recover pages from existing sessions. For now fail session * creation. */ - status = set_forechannel_maxreqs(fchan); + status = set_forechannel_drc_size(fchan); + session_fchan->maxresp_cached = fchan->maxresp_cached; session_fchan->maxreqs = fchan->maxreqs; + + dprintk("%s status %d\n", __func__, status); return status; } +static void +free_session_slots(struct nfsd4_session *ses) +{ + int i; + + for (i = 0; i < ses->se_fchannel.maxreqs; i++) + kfree(ses->se_slots[i]); +} + static int alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) { struct nfsd4_session *new, tmp; - int idx, status = nfserr_resource, slotsize; + struct nfsd4_slot *sp; + int idx, slotsize, cachesize, i; + int status; memset(&tmp, 0, sizeof(tmp)); @@ -506,14 +541,27 @@ alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, if (status) goto out; - /* allocate struct nfsd4_session and slot table in one piece */ - slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot); + BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) + + sizeof(struct nfsd4_session) > PAGE_SIZE); + + status = nfserr_serverfault; + /* allocate struct nfsd4_session and slot table pointers in one piece */ + slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); if (!new) goto out; memcpy(new, &tmp, sizeof(*new)); + /* allocate each struct nfsd4_slot and data cache in one piece */ + cachesize = new->se_fchannel.maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; + for (i = 0; i < new->se_fchannel.maxreqs; i++) { + sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); + if (!sp) + goto out_free; + new->se_slots[i] = sp; + } + new->se_client = clp; gen_sessionid(new); idx = hash_sessionid(&new->se_sessionid); @@ -530,6 +578,10 @@ alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, status = nfs_ok; out: return status; +out_free: + free_session_slots(new); + kfree(new); + goto out; } /* caller must hold sessionid_lock */ @@ -572,19 +624,16 @@ release_session(struct nfsd4_session *ses) nfsd4_put_session(ses); } -static void nfsd4_release_respages(struct page **respages, short resused); - void free_session(struct kref *kref) { struct nfsd4_session *ses; - int i; ses = container_of(kref, struct nfsd4_session, se_ref); - for (i = 0; i < ses->se_fchannel.maxreqs; i++) { - struct nfsd4_cache_entry *e = &ses->se_slots[i].sl_cache_entry; - nfsd4_release_respages(e->ce_respages, e->ce_resused); - } + spin_lock(&nfsd_drc_lock); + nfsd_drc_mem_used -= ses->se_fchannel.maxreqs * NFSD_SLOT_CACHE_SIZE; + spin_unlock(&nfsd_drc_lock); + free_session_slots(ses); kfree(ses); } @@ -647,18 +696,14 @@ shutdown_callback_client(struct nfs4_client *clp) clp->cl_cb_conn.cb_client = NULL; rpc_shutdown_client(clnt); } - if (clp->cl_cb_conn.cb_cred) { - put_rpccred(clp->cl_cb_conn.cb_cred); - clp->cl_cb_conn.cb_cred = NULL; - } } static inline void free_client(struct nfs4_client *clp) { shutdown_callback_client(clp); - nfsd4_release_respages(clp->cl_slot.sl_cache_entry.ce_respages, - clp->cl_slot.sl_cache_entry.ce_resused); + if (clp->cl_cb_xprt) + svc_xprt_put(clp->cl_cb_xprt); if (clp->cl_cred.cr_group_info) put_group_info(clp->cl_cred.cr_group_info); kfree(clp->cl_principal); @@ -714,25 +759,6 @@ expire_client(struct nfs4_client *clp) put_nfs4_client(clp); } -static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) -{ - struct nfs4_client *clp; - - clp = alloc_client(name); - if (clp == NULL) - return NULL; - memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); - atomic_set(&clp->cl_count, 1); - atomic_set(&clp->cl_cb_conn.cb_set, 0); - INIT_LIST_HEAD(&clp->cl_idhash); - INIT_LIST_HEAD(&clp->cl_strhash); - INIT_LIST_HEAD(&clp->cl_openowners); - INIT_LIST_HEAD(&clp->cl_delegations); - INIT_LIST_HEAD(&clp->cl_sessions); - INIT_LIST_HEAD(&clp->cl_lru); - return clp; -} - static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) { memcpy(target->cl_verifier.data, source->data, @@ -795,6 +821,46 @@ static void gen_confirm(struct nfs4_client *clp) *p++ = i++; } +static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, + struct svc_rqst *rqstp, nfs4_verifier *verf) +{ + struct nfs4_client *clp; + struct sockaddr *sa = svc_addr(rqstp); + char *princ; + + clp = alloc_client(name); + if (clp == NULL) + return NULL; + + princ = svc_gss_principal(rqstp); + if (princ) { + clp->cl_principal = kstrdup(princ, GFP_KERNEL); + if (clp->cl_principal == NULL) { + free_client(clp); + return NULL; + } + } + + memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); + atomic_set(&clp->cl_count, 1); + atomic_set(&clp->cl_cb_conn.cb_set, 0); + INIT_LIST_HEAD(&clp->cl_idhash); + INIT_LIST_HEAD(&clp->cl_strhash); + INIT_LIST_HEAD(&clp->cl_openowners); + INIT_LIST_HEAD(&clp->cl_delegations); + INIT_LIST_HEAD(&clp->cl_sessions); + INIT_LIST_HEAD(&clp->cl_lru); + clear_bit(0, &clp->cl_cb_slot_busy); + rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); + copy_verf(clp, verf); + rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); + clp->cl_flavor = rqstp->rq_flavor; + copy_cred(&clp->cl_cred, &rqstp->rq_cred); + gen_confirm(clp); + + return clp; +} + static int check_name(struct xdr_netobj name) { if (name.len == 0) @@ -902,93 +968,40 @@ find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, return NULL; } -/* a helper function for parse_callback */ -static int -parse_octet(unsigned int *lenp, char **addrp) -{ - unsigned int len = *lenp; - char *p = *addrp; - int n = -1; - char c; - - for (;;) { - if (!len) - break; - len--; - c = *p++; - if (c == '.') - break; - if ((c < '0') || (c > '9')) { - n = -1; - break; - } - if (n < 0) - n = 0; - n = (n * 10) + (c - '0'); - if (n > 255) { - n = -1; - break; - } - } - *lenp = len; - *addrp = p; - return n; -} - -/* parse and set the setclientid ipv4 callback address */ -static int -parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) -{ - int temp = 0; - u32 cbaddr = 0; - u16 cbport = 0; - u32 addrlen = addr_len; - char *addr = addr_val; - int i, shift; - - /* ipaddress */ - shift = 24; - for(i = 4; i > 0 ; i--) { - if ((temp = parse_octet(&addrlen, &addr)) < 0) { - return 0; - } - cbaddr |= (temp << shift); - if (shift > 0) - shift -= 8; - } - *cbaddrp = cbaddr; - - /* port */ - shift = 8; - for(i = 2; i > 0 ; i--) { - if ((temp = parse_octet(&addrlen, &addr)) < 0) { - return 0; - } - cbport |= (temp << shift); - if (shift > 0) - shift -= 8; - } - *cbportp = cbport; - return 1; -} - static void -gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) +gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) { struct nfs4_cb_conn *cb = &clp->cl_cb_conn; - - /* Currently, we only support tcp for the callback channel */ - if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) + unsigned short expected_family; + + /* Currently, we only support tcp and tcp6 for the callback channel */ + if (se->se_callback_netid_len == 3 && + !memcmp(se->se_callback_netid_val, "tcp", 3)) + expected_family = AF_INET; + else if (se->se_callback_netid_len == 4 && + !memcmp(se->se_callback_netid_val, "tcp6", 4)) + expected_family = AF_INET6; + else goto out_err; - if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, - &cb->cb_addr, &cb->cb_port))) + cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, + se->se_callback_addr_len, + (struct sockaddr *) &cb->cb_addr, + sizeof(cb->cb_addr)); + + if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) goto out_err; + + if (cb->cb_addr.ss_family == AF_INET6) + ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; + cb->cb_minorversion = 0; cb->cb_prog = se->se_callback_prog; cb->cb_ident = se->se_callback_ident; return; out_err: + cb->cb_addr.ss_family = AF_UNSPEC; + cb->cb_addrlen = 0; dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " "will not receive delegations\n", clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); @@ -996,175 +1009,87 @@ out_err: return; } -void -nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp) -{ - struct nfsd4_compoundres *resp = rqstp->rq_resp; - - resp->cstate.statp = statp; -} - /* - * Dereference the result pages. + * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. */ -static void -nfsd4_release_respages(struct page **respages, short resused) +void +nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) { - int i; + struct nfsd4_slot *slot = resp->cstate.slot; + unsigned int base; - dprintk("--> %s\n", __func__); - for (i = 0; i < resused; i++) { - if (!respages[i]) - continue; - put_page(respages[i]); - respages[i] = NULL; - } -} + dprintk("--> %s slot %p\n", __func__, slot); -static void -nfsd4_copy_pages(struct page **topages, struct page **frompages, short count) -{ - int i; + slot->sl_opcnt = resp->opcnt; + slot->sl_status = resp->cstate.status; - for (i = 0; i < count; i++) { - topages[i] = frompages[i]; - if (!topages[i]) - continue; - get_page(topages[i]); + if (nfsd4_not_cached(resp)) { + slot->sl_datalen = 0; + return; } + slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; + base = (char *)resp->cstate.datap - + (char *)resp->xbuf->head[0].iov_base; + if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, + slot->sl_datalen)) + WARN("%s: sessions DRC could not cache compound\n", __func__); + return; } /* - * Cache the reply pages up to NFSD_PAGES_PER_SLOT + 1, clearing the previous - * pages. We add a page to NFSD_PAGES_PER_SLOT for the case where the total - * length of the XDR response is less than se_fmaxresp_cached - * (NFSD_PAGES_PER_SLOT * PAGE_SIZE) but the xdr_buf pages is used for a - * of the reply (e.g. readdir). + * Encode the replay sequence operation from the slot values. + * If cachethis is FALSE encode the uncached rep error on the next + * operation which sets resp->p and increments resp->opcnt for + * nfs4svc_encode_compoundres. * - * Store the base and length of the rq_req.head[0] page - * of the NFSv4.1 data, just past the rpc header. */ -void -nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) +static __be32 +nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, + struct nfsd4_compoundres *resp) { - struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; - struct svc_rqst *rqstp = resp->rqstp; - struct nfsd4_compoundargs *args = rqstp->rq_argp; - struct nfsd4_op *op = &args->ops[resp->opcnt]; - struct kvec *resv = &rqstp->rq_res.head[0]; - - dprintk("--> %s entry %p\n", __func__, entry); - - /* Don't cache a failed OP_SEQUENCE. */ - if (resp->opcnt == 1 && op->opnum == OP_SEQUENCE && resp->cstate.status) - return; + struct nfsd4_op *op; + struct nfsd4_slot *slot = resp->cstate.slot; - nfsd4_release_respages(entry->ce_respages, entry->ce_resused); - entry->ce_opcnt = resp->opcnt; - entry->ce_status = resp->cstate.status; + dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, + resp->opcnt, resp->cstate.slot->sl_cachethis); - /* - * Don't need a page to cache just the sequence operation - the slot - * does this for us! - */ + /* Encode the replayed sequence operation */ + op = &args->ops[resp->opcnt - 1]; + nfsd4_encode_operation(resp, op); - if (nfsd4_not_cached(resp)) { - entry->ce_resused = 0; - entry->ce_rpchdrlen = 0; - dprintk("%s Just cache SEQUENCE. ce_cachethis %d\n", __func__, - resp->cstate.slot->sl_cache_entry.ce_cachethis); - return; - } - entry->ce_resused = rqstp->rq_resused; - if (entry->ce_resused > NFSD_PAGES_PER_SLOT + 1) - entry->ce_resused = NFSD_PAGES_PER_SLOT + 1; - nfsd4_copy_pages(entry->ce_respages, rqstp->rq_respages, - entry->ce_resused); - entry->ce_datav.iov_base = resp->cstate.statp; - entry->ce_datav.iov_len = resv->iov_len - ((char *)resp->cstate.statp - - (char *)page_address(rqstp->rq_respages[0])); - /* Current request rpc header length*/ - entry->ce_rpchdrlen = (char *)resp->cstate.statp - - (char *)page_address(rqstp->rq_respages[0]); -} - -/* - * We keep the rpc header, but take the nfs reply from the replycache. - */ -static int -nfsd41_copy_replay_data(struct nfsd4_compoundres *resp, - struct nfsd4_cache_entry *entry) -{ - struct svc_rqst *rqstp = resp->rqstp; - struct kvec *resv = &resp->rqstp->rq_res.head[0]; - int len; - - /* Current request rpc header length*/ - len = (char *)resp->cstate.statp - - (char *)page_address(rqstp->rq_respages[0]); - if (entry->ce_datav.iov_len + len > PAGE_SIZE) { - dprintk("%s v41 cached reply too large (%Zd).\n", __func__, - entry->ce_datav.iov_len); - return 0; + /* Return nfserr_retry_uncached_rep in next operation. */ + if (args->opcnt > 1 && slot->sl_cachethis == 0) { + op = &args->ops[resp->opcnt++]; + op->status = nfserr_retry_uncached_rep; + nfsd4_encode_operation(resp, op); } - /* copy the cached reply nfsd data past the current rpc header */ - memcpy((char *)resv->iov_base + len, entry->ce_datav.iov_base, - entry->ce_datav.iov_len); - resv->iov_len = len + entry->ce_datav.iov_len; - return 1; + return op->status; } /* - * Keep the first page of the replay. Copy the NFSv4.1 data from the first - * cached page. Replace any futher replay pages from the cache. + * The sequence operation is not cached because we can use the slot and + * session values. */ __be32 nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, struct nfsd4_sequence *seq) { - struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; + struct nfsd4_slot *slot = resp->cstate.slot; __be32 status; - dprintk("--> %s entry %p\n", __func__, entry); - - /* - * If this is just the sequence operation, we did not keep - * a page in the cache entry because we can just use the - * slot info stored in struct nfsd4_sequence that was checked - * against the slot in nfsd4_sequence(). - * - * This occurs when seq->cachethis is FALSE, or when the client - * session inactivity timer fires and a solo sequence operation - * is sent (lease renewal). - */ - if (seq && nfsd4_not_cached(resp)) { - seq->maxslots = resp->cstate.session->se_fchannel.maxreqs; - return nfs_ok; - } - - if (!nfsd41_copy_replay_data(resp, entry)) { - /* - * Not enough room to use the replay rpc header, send the - * cached header. Release all the allocated result pages. - */ - svc_free_res_pages(resp->rqstp); - nfsd4_copy_pages(resp->rqstp->rq_respages, entry->ce_respages, - entry->ce_resused); - } else { - /* Release all but the first allocated result page */ + dprintk("--> %s slot %p\n", __func__, slot); - resp->rqstp->rq_resused--; - svc_free_res_pages(resp->rqstp); + /* Either returns 0 or nfserr_retry_uncached */ + status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); + if (status == nfserr_retry_uncached_rep) + return status; - nfsd4_copy_pages(&resp->rqstp->rq_respages[1], - &entry->ce_respages[1], - entry->ce_resused - 1); - } + /* The sequence operation has been encoded, cstate->datap set. */ + memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); - resp->rqstp->rq_resused = entry->ce_resused; - resp->opcnt = entry->ce_opcnt; - resp->cstate.iovlen = entry->ce_datav.iov_len + entry->ce_rpchdrlen; - status = entry->ce_status; + resp->opcnt = slot->sl_opcnt; + resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); + status = slot->sl_status; return status; } @@ -1194,13 +1119,15 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, int status; unsigned int strhashval; char dname[HEXDIR_LEN]; + char addr_str[INET6_ADDRSTRLEN]; nfs4_verifier verf = exid->verifier; - u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; + struct sockaddr *sa = svc_addr(rqstp); + rpc_ntop(sa, addr_str, sizeof(addr_str)); dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " - " ip_addr=%u flags %x, spa_how %d\n", + "ip_addr=%s flags %x, spa_how %d\n", __func__, rqstp, exid, exid->clname.len, exid->clname.data, - ip_addr, exid->flags, exid->spa_how); + addr_str, exid->flags, exid->spa_how); if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) return nfserr_inval; @@ -1281,28 +1208,23 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, out_new: /* Normal case */ - new = create_client(exid->clname, dname); + new = create_client(exid->clname, dname, rqstp, &verf); if (new == NULL) { - status = nfserr_resource; + status = nfserr_serverfault; goto out; } - copy_verf(new, &verf); - copy_cred(&new->cl_cred, &rqstp->rq_cred); - new->cl_addr = ip_addr; gen_clid(new); - gen_confirm(new); add_to_unconfirmed(new, strhashval); out_copy: exid->clientid.cl_boot = new->cl_clientid.cl_boot; exid->clientid.cl_id = new->cl_clientid.cl_id; - new->cl_slot.sl_seqid = 0; exid->seqid = 1; nfsd4_set_ex_flags(new, exid); dprintk("nfsd4_exchange_id seqid %d flags %x\n", - new->cl_slot.sl_seqid, new->cl_exchange_flags); + new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); status = nfs_ok; out: @@ -1313,40 +1235,60 @@ error: } static int -check_slot_seqid(u32 seqid, struct nfsd4_slot *slot) +check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) { - dprintk("%s enter. seqid %d slot->sl_seqid %d\n", __func__, seqid, - slot->sl_seqid); + dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, + slot_seqid); /* The slot is in use, and no response has been sent. */ - if (slot->sl_inuse) { - if (seqid == slot->sl_seqid) + if (slot_inuse) { + if (seqid == slot_seqid) return nfserr_jukebox; else return nfserr_seq_misordered; } /* Normal */ - if (likely(seqid == slot->sl_seqid + 1)) + if (likely(seqid == slot_seqid + 1)) return nfs_ok; /* Replay */ - if (seqid == slot->sl_seqid) + if (seqid == slot_seqid) return nfserr_replay_cache; /* Wraparound */ - if (seqid == 1 && (slot->sl_seqid + 1) == 0) + if (seqid == 1 && (slot_seqid + 1) == 0) return nfs_ok; /* Misordered replay or misordered new request */ return nfserr_seq_misordered; } +/* + * Cache the create session result into the create session single DRC + * slot cache by saving the xdr structure. sl_seqid has been set. + * Do this for solo or embedded create session operations. + */ +static void +nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, + struct nfsd4_clid_slot *slot, int nfserr) +{ + slot->sl_status = nfserr; + memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); +} + +static __be32 +nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, + struct nfsd4_clid_slot *slot) +{ + memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); + return slot->sl_status; +} + __be32 nfsd4_create_session(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_create_session *cr_ses) { - u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; - struct nfsd4_compoundres *resp = rqstp->rq_resp; + struct sockaddr *sa = svc_addr(rqstp); struct nfs4_client *conf, *unconf; - struct nfsd4_slot *slot = NULL; + struct nfsd4_clid_slot *cs_slot = NULL; int status = 0; nfs4_lock_state(); @@ -1354,40 +1296,38 @@ nfsd4_create_session(struct svc_rqst *rqstp, conf = find_confirmed_client(&cr_ses->clientid); if (conf) { - slot = &conf->cl_slot; - status = check_slot_seqid(cr_ses->seqid, slot); + cs_slot = &conf->cl_cs_slot; + status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); if (status == nfserr_replay_cache) { dprintk("Got a create_session replay! seqid= %d\n", - slot->sl_seqid); - cstate->slot = slot; - cstate->status = status; + cs_slot->sl_seqid); /* Return the cached reply status */ - status = nfsd4_replay_cache_entry(resp, NULL); + status = nfsd4_replay_create_session(cr_ses, cs_slot); goto out; - } else if (cr_ses->seqid != conf->cl_slot.sl_seqid + 1) { + } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { status = nfserr_seq_misordered; dprintk("Sequence misordered!\n"); dprintk("Expected seqid= %d but got seqid= %d\n", - slot->sl_seqid, cr_ses->seqid); + cs_slot->sl_seqid, cr_ses->seqid); goto out; } - conf->cl_slot.sl_seqid++; + cs_slot->sl_seqid++; } else if (unconf) { if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || - (ip_addr != unconf->cl_addr)) { + !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { status = nfserr_clid_inuse; goto out; } - slot = &unconf->cl_slot; - status = check_slot_seqid(cr_ses->seqid, slot); + cs_slot = &unconf->cl_cs_slot; + status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); if (status) { /* an unconfirmed replay returns misordered */ status = nfserr_seq_misordered; - goto out; + goto out_cache; } - slot->sl_seqid++; /* from 0 to 1 */ + cs_slot->sl_seqid++; /* from 0 to 1 */ move_to_confirmed(unconf); /* @@ -1396,6 +1336,19 @@ nfsd4_create_session(struct svc_rqst *rqstp, cr_ses->flags &= ~SESSION4_PERSIST; cr_ses->flags &= ~SESSION4_RDMA; + if (cr_ses->flags & SESSION4_BACK_CHAN) { + unconf->cl_cb_xprt = rqstp->rq_xprt; + svc_xprt_get(unconf->cl_cb_xprt); + rpc_copy_addr( + (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, + sa); + unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); + unconf->cl_cb_conn.cb_minorversion = + cstate->minorversion; + unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; + unconf->cl_cb_seq_nr = 1; + nfsd4_probe_callback(unconf); + } conf = unconf; } else { status = nfserr_stale_clientid; @@ -1408,12 +1361,11 @@ nfsd4_create_session(struct svc_rqst *rqstp, memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, NFS4_MAX_SESSIONID_LEN); - cr_ses->seqid = slot->sl_seqid; + cr_ses->seqid = cs_slot->sl_seqid; - slot->sl_inuse = true; - cstate->slot = slot; - /* Ensure a page is used for the cache */ - slot->sl_cache_entry.ce_cachethis = 1; +out_cache: + /* cache solo and embedded create sessions under the state lock */ + nfsd4_cache_create_session(cr_ses, cs_slot, status); out: nfs4_unlock_state(); dprintk("%s returns %d\n", __func__, ntohl(status)); @@ -1478,18 +1430,23 @@ nfsd4_sequence(struct svc_rqst *rqstp, if (seq->slotid >= session->se_fchannel.maxreqs) goto out; - slot = &session->se_slots[seq->slotid]; + slot = session->se_slots[seq->slotid]; dprintk("%s: slotid %d\n", __func__, seq->slotid); - status = check_slot_seqid(seq->seqid, slot); + /* We do not negotiate the number of slots yet, so set the + * maxslots to the session maxreqs which is used to encode + * sr_highest_slotid and the sr_target_slot id to maxslots */ + seq->maxslots = session->se_fchannel.maxreqs; + + status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); if (status == nfserr_replay_cache) { cstate->slot = slot; cstate->session = session; /* Return the cached reply status and set cstate->status - * for nfsd4_svc_encode_compoundres processing */ + * for nfsd4_proc_compound processing */ status = nfsd4_replay_cache_entry(resp, seq); cstate->status = nfserr_replay_cache; - goto replay_cache; + goto out; } if (status) goto out; @@ -1497,23 +1454,23 @@ nfsd4_sequence(struct svc_rqst *rqstp, /* Success! bump slot seqid */ slot->sl_inuse = true; slot->sl_seqid = seq->seqid; - slot->sl_cache_entry.ce_cachethis = seq->cachethis; - /* Always set the cache entry cachethis for solo sequence */ - if (nfsd4_is_solo_sequence(resp)) - slot->sl_cache_entry.ce_cachethis = 1; + slot->sl_cachethis = seq->cachethis; cstate->slot = slot; cstate->session = session; -replay_cache: - /* Renew the clientid on success and on replay. - * Hold a session reference until done processing the compound: + /* Hold a session reference until done processing the compound: * nfsd4_put_session called only if the cstate slot is set. */ - renew_client(session->se_client); nfsd4_get_session(session); out: spin_unlock(&sessionid_lock); + /* Renew the clientid on success and on replay */ + if (cstate->session) { + nfs4_lock_state(); + renew_client(session->se_client); + nfs4_unlock_state(); + } dprintk("%s: return %d\n", __func__, ntohl(status)); return status; } @@ -1522,7 +1479,7 @@ __be32 nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_setclientid *setclid) { - struct sockaddr_in *sin = svc_addr_in(rqstp); + struct sockaddr *sa = svc_addr(rqstp); struct xdr_netobj clname = { .len = setclid->se_namelen, .data = setclid->se_name, @@ -1531,7 +1488,6 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, unsigned int strhashval; struct nfs4_client *conf, *unconf, *new; __be32 status; - char *princ; char dname[HEXDIR_LEN]; if (!check_name(clname)) @@ -1554,8 +1510,11 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, /* RFC 3530 14.2.33 CASE 0: */ status = nfserr_clid_inuse; if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { - dprintk("NFSD: setclientid: string in use by client" - " at %pI4\n", &conf->cl_addr); + char addr_str[INET6_ADDRSTRLEN]; + rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, + sizeof(addr_str)); + dprintk("NFSD: setclientid: string in use by client " + "at %s\n", addr_str); goto out; } } @@ -1573,7 +1532,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, */ if (unconf) expire_client(unconf); - new = create_client(clname, dname); + new = create_client(clname, dname, rqstp, &clverifier); if (new == NULL) goto out; gen_clid(new); @@ -1590,7 +1549,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, */ expire_client(unconf); } - new = create_client(clname, dname); + new = create_client(clname, dname, rqstp, &clverifier); if (new == NULL) goto out; copy_clid(new, conf); @@ -1600,7 +1559,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, * probable client reboot; state will be removed if * confirmed. */ - new = create_client(clname, dname); + new = create_client(clname, dname, rqstp, &clverifier); if (new == NULL) goto out; gen_clid(new); @@ -1611,25 +1570,12 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, * confirmed. */ expire_client(unconf); - new = create_client(clname, dname); + new = create_client(clname, dname, rqstp, &clverifier); if (new == NULL) goto out; gen_clid(new); } - copy_verf(new, &clverifier); - new->cl_addr = sin->sin_addr.s_addr; - new->cl_flavor = rqstp->rq_flavor; - princ = svc_gss_principal(rqstp); - if (princ) { - new->cl_principal = kstrdup(princ, GFP_KERNEL); - if (new->cl_principal == NULL) { - free_client(new); - goto out; - } - } - copy_cred(&new->cl_cred, &rqstp->rq_cred); - gen_confirm(new); - gen_callback(new, setclid); + gen_callback(new, setclid, rpc_get_scope_id(sa)); add_to_unconfirmed(new, strhashval); setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; setclid->se_clientid.cl_id = new->cl_clientid.cl_id; @@ -1651,7 +1597,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_setclientid_confirm *setclientid_confirm) { - struct sockaddr_in *sin = svc_addr_in(rqstp); + struct sockaddr *sa = svc_addr(rqstp); struct nfs4_client *conf, *unconf; nfs4_verifier confirm = setclientid_confirm->sc_confirm; clientid_t * clid = &setclientid_confirm->sc_clientid; @@ -1670,9 +1616,9 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, unconf = find_unconfirmed_client(clid); status = nfserr_clid_inuse; - if (conf && conf->cl_addr != sin->sin_addr.s_addr) + if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) goto out; - if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) + if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) goto out; /* @@ -4072,7 +4018,7 @@ set_max_delegations(void) /* initialization to perform when the nfsd service is started: */ -static void +static int __nfs4_state_start(void) { unsigned long grace_time; @@ -4084,19 +4030,26 @@ __nfs4_state_start(void) printk(KERN_INFO "NFSD: starting %ld-second grace period\n", grace_time/HZ); laundry_wq = create_singlethread_workqueue("nfsd4"); + if (laundry_wq == NULL) + return -ENOMEM; queue_delayed_work(laundry_wq, &laundromat_work, grace_time); set_max_delegations(); + return set_callback_cred(); } -void +int nfs4_state_start(void) { + int ret; + if (nfs4_init) - return; + return 0; nfsd4_load_reboot_recovery_data(); - __nfs4_state_start(); + ret = __nfs4_state_start(); + if (ret) + return ret; nfs4_init = 1; - return; + return 0; } time_t diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 2dcc7feaa6ff0..0fbd50cee1f60 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1599,7 +1599,8 @@ static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) { struct svc_fh tmp_fh; - char *path, *rootpath; + char *path = NULL, *rootpath; + size_t rootlen; fh_init(&tmp_fh, NFS4_FHSIZE); *stat = exp_pseudoroot(rqstp, &tmp_fh); @@ -1609,14 +1610,18 @@ static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 * path = exp->ex_pathname; - if (strncmp(path, rootpath, strlen(rootpath))) { + rootlen = strlen(rootpath); + if (strncmp(path, rootpath, rootlen)) { dprintk("nfsd: fs_locations failed;" "%s is not contained in %s\n", path, rootpath); *stat = nfserr_notsupp; - return NULL; + path = NULL; + goto out; } - - return path + strlen(rootpath); + path += rootlen; +out: + fh_put(&tmp_fh); + return path; } /* @@ -1793,11 +1798,6 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, goto out_nfserr; } } - if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { - if (exp->ex_fslocs.locations == NULL) { - bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS; - } - } if ((buflen -= 16) < 0) goto out_resource; @@ -1825,8 +1825,6 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, goto out_resource; if (!aclsupport) word0 &= ~FATTR4_WORD0_ACL; - if (!exp->ex_fslocs.locations) - word0 &= ~FATTR4_WORD0_FS_LOCATIONS; if (!word2) { WRITE32(2); WRITE32(word0); @@ -3064,6 +3062,7 @@ nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, WRITE32(0); ADJUST_ARGS(); + resp->cstate.datap = p; /* DRC cache data pointer */ return 0; } @@ -3166,7 +3165,7 @@ static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp) return status; session = resp->cstate.session; - if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0) + if (session == NULL || slot->sl_cachethis == 0) return status; if (resp->opcnt >= args->opcnt) @@ -3291,6 +3290,7 @@ nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compo /* * All that remains is to write the tag and operation count... */ + struct nfsd4_compound_state *cs = &resp->cstate; struct kvec *iov; p = resp->tagp; *p++ = htonl(resp->taglen); @@ -3304,17 +3304,11 @@ nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compo iov = &rqstp->rq_res.head[0]; iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; BUG_ON(iov->iov_len > PAGE_SIZE); - if (nfsd4_has_session(&resp->cstate)) { - if (resp->cstate.status == nfserr_replay_cache && - !nfsd4_not_cached(resp)) { - iov->iov_len = resp->cstate.iovlen; - } else { - nfsd4_store_cache_entry(resp); - dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); - resp->cstate.slot->sl_inuse = 0; - } - if (resp->cstate.session) - nfsd4_put_session(resp->cstate.session); + if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) { + nfsd4_store_cache_entry(resp); + dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); + resp->cstate.slot->sl_inuse = false; + nfsd4_put_session(resp->cstate.session); } return 1; } diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 7e906c5b7671e..00388d2a3c997 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -174,12 +174,13 @@ static const struct file_operations exports_operations = { }; extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); +extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); static struct file_operations pool_stats_operations = { .open = nfsd_pool_stats_open, .read = seq_read, .llseek = seq_lseek, - .release = seq_release, + .release = nfsd_pool_stats_release, .owner = THIS_MODULE, }; @@ -776,10 +777,7 @@ static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) size -= len; mesg += len; } - - mutex_unlock(&nfsd_mutex); - return (mesg-buf); - + rv = mesg - buf; out_free: kfree(nthreads); mutex_unlock(&nfsd_mutex); diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index 8847f3fbfc1e3..01965b2f3a769 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -397,44 +397,51 @@ static inline void _fh_update_old(struct dentry *dentry, fh->ofh_dirino = 0; } -__be32 -fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, - struct svc_fh *ref_fh) +static bool is_root_export(struct svc_export *exp) { - /* ref_fh is a reference file handle. - * if it is non-null and for the same filesystem, then we should compose - * a filehandle which is of the same version, where possible. - * Currently, that means that if ref_fh->fh_handle.fh_version == 0xca - * Then create a 32byte filehandle using nfs_fhbase_old - * - */ + return exp->ex_path.dentry == exp->ex_path.dentry->d_sb->s_root; +} - u8 version; - u8 fsid_type = 0; - struct inode * inode = dentry->d_inode; - struct dentry *parent = dentry->d_parent; - __u32 *datap; - dev_t ex_dev = exp->ex_path.dentry->d_inode->i_sb->s_dev; - int root_export = (exp->ex_path.dentry == exp->ex_path.dentry->d_sb->s_root); +static struct super_block *exp_sb(struct svc_export *exp) +{ + return exp->ex_path.dentry->d_inode->i_sb; +} - dprintk("nfsd: fh_compose(exp %02x:%02x/%ld %s/%s, ino=%ld)\n", - MAJOR(ex_dev), MINOR(ex_dev), - (long) exp->ex_path.dentry->d_inode->i_ino, - parent->d_name.name, dentry->d_name.name, - (inode ? inode->i_ino : 0)); +static bool fsid_type_ok_for_exp(u8 fsid_type, struct svc_export *exp) +{ + switch (fsid_type) { + case FSID_DEV: + if (!old_valid_dev(exp_sb(exp)->s_dev)) + return 0; + /* FALL THROUGH */ + case FSID_MAJOR_MINOR: + case FSID_ENCODE_DEV: + return exp_sb(exp)->s_type->fs_flags & FS_REQUIRES_DEV; + case FSID_NUM: + return exp->ex_flags & NFSEXP_FSID; + case FSID_UUID8: + case FSID_UUID16: + if (!is_root_export(exp)) + return 0; + /* fall through */ + case FSID_UUID4_INUM: + case FSID_UUID16_INUM: + return exp->ex_uuid != NULL; + } + return 1; +} - /* Choose filehandle version and fsid type based on - * the reference filehandle (if it is in the same export) - * or the export options. - */ - retry: + +static void set_version_and_fsid_type(struct svc_fh *fhp, struct svc_export *exp, struct svc_fh *ref_fh) +{ + u8 version; + u8 fsid_type; +retry: version = 1; if (ref_fh && ref_fh->fh_export == exp) { version = ref_fh->fh_handle.fh_version; fsid_type = ref_fh->fh_handle.fh_fsid_type; - if (ref_fh == fhp) - fh_put(ref_fh); ref_fh = NULL; switch (version) { @@ -447,58 +454,66 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, goto retry; } - /* Need to check that this type works for this - * export point. As the fsid -> filesystem mapping - * was guided by user-space, there is no guarantee - * that the filesystem actually supports that fsid - * type. If it doesn't we loop around again without - * ref_fh set. + /* + * As the fsid -> filesystem mapping was guided by + * user-space, there is no guarantee that the filesystem + * actually supports that fsid type. If it doesn't we + * loop around again without ref_fh set. */ - switch(fsid_type) { - case FSID_DEV: - if (!old_valid_dev(ex_dev)) - goto retry; - /* FALL THROUGH */ - case FSID_MAJOR_MINOR: - case FSID_ENCODE_DEV: - if (!(exp->ex_path.dentry->d_inode->i_sb->s_type->fs_flags - & FS_REQUIRES_DEV)) - goto retry; - break; - case FSID_NUM: - if (! (exp->ex_flags & NFSEXP_FSID)) - goto retry; - break; - case FSID_UUID8: - case FSID_UUID16: - if (!root_export) - goto retry; - /* fall through */ - case FSID_UUID4_INUM: - case FSID_UUID16_INUM: - if (exp->ex_uuid == NULL) - goto retry; - break; - } + if (!fsid_type_ok_for_exp(fsid_type, exp)) + goto retry; } else if (exp->ex_flags & NFSEXP_FSID) { fsid_type = FSID_NUM; } else if (exp->ex_uuid) { if (fhp->fh_maxsize >= 64) { - if (root_export) + if (is_root_export(exp)) fsid_type = FSID_UUID16; else fsid_type = FSID_UUID16_INUM; } else { - if (root_export) + if (is_root_export(exp)) fsid_type = FSID_UUID8; else fsid_type = FSID_UUID4_INUM; } - } else if (!old_valid_dev(ex_dev)) + } else if (!old_valid_dev(exp_sb(exp)->s_dev)) /* for newer device numbers, we must use a newer fsid format */ fsid_type = FSID_ENCODE_DEV; else fsid_type = FSID_DEV; + fhp->fh_handle.fh_version = version; + if (version) + fhp->fh_handle.fh_fsid_type = fsid_type; +} + +__be32 +fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, + struct svc_fh *ref_fh) +{ + /* ref_fh is a reference file handle. + * if it is non-null and for the same filesystem, then we should compose + * a filehandle which is of the same version, where possible. + * Currently, that means that if ref_fh->fh_handle.fh_version == 0xca + * Then create a 32byte filehandle using nfs_fhbase_old + * + */ + + struct inode * inode = dentry->d_inode; + struct dentry *parent = dentry->d_parent; + __u32 *datap; + dev_t ex_dev = exp_sb(exp)->s_dev; + + dprintk("nfsd: fh_compose(exp %02x:%02x/%ld %s/%s, ino=%ld)\n", + MAJOR(ex_dev), MINOR(ex_dev), + (long) exp->ex_path.dentry->d_inode->i_ino, + parent->d_name.name, dentry->d_name.name, + (inode ? inode->i_ino : 0)); + + /* Choose filehandle version and fsid type based on + * the reference filehandle (if it is in the same export) + * or the export options. + */ + set_version_and_fsid_type(fhp, exp, ref_fh); if (ref_fh == fhp) fh_put(ref_fh); @@ -516,7 +531,7 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, fhp->fh_export = exp; cache_get(&exp->h); - if (version == 0xca) { + if (fhp->fh_handle.fh_version == 0xca) { /* old style filehandle please */ memset(&fhp->fh_handle.fh_base, 0, NFS_FHSIZE); fhp->fh_handle.fh_size = NFS_FHSIZE; @@ -530,22 +545,22 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, _fh_update_old(dentry, exp, &fhp->fh_handle); } else { int len; - fhp->fh_handle.fh_version = 1; fhp->fh_handle.fh_auth_type = 0; datap = fhp->fh_handle.fh_auth+0; - fhp->fh_handle.fh_fsid_type = fsid_type; - mk_fsid(fsid_type, datap, ex_dev, + mk_fsid(fhp->fh_handle.fh_fsid_type, datap, ex_dev, exp->ex_path.dentry->d_inode->i_ino, exp->ex_fsid, exp->ex_uuid); - len = key_len(fsid_type); + len = key_len(fhp->fh_handle.fh_fsid_type); datap += len/4; fhp->fh_handle.fh_size = 4 + len; if (inode) _fh_update(fhp, exp, dentry); - if (fhp->fh_handle.fh_fileid_type == 255) + if (fhp->fh_handle.fh_fileid_type == 255) { + fh_put(fhp); return nfserr_opnotsupp; + } } return 0; @@ -639,8 +654,7 @@ enum fsid_source fsid_source(struct svc_fh *fhp) case FSID_DEV: case FSID_ENCODE_DEV: case FSID_MAJOR_MINOR: - if (fhp->fh_export->ex_path.dentry->d_inode->i_sb->s_type->fs_flags - & FS_REQUIRES_DEV) + if (exp_sb(fhp->fh_export)->s_type->fs_flags & FS_REQUIRES_DEV) return FSIDSOURCE_DEV; break; case FSID_NUM: diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 24d58adfe5fdc..67ea83eedd43e 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -34,6 +34,7 @@ #include <linux/nfsd/syscall.h> #include <linux/lockd/bind.h> #include <linux/nfsacl.h> +#include <linux/seq_file.h> #define NFSDDBG_FACILITY NFSDDBG_SVC @@ -66,6 +67,16 @@ struct timeval nfssvc_boot; DEFINE_MUTEX(nfsd_mutex); struct svc_serv *nfsd_serv; +/* + * nfsd_drc_lock protects nfsd_drc_max_pages and nfsd_drc_pages_used. + * nfsd_drc_max_pages limits the total amount of memory available for + * version 4.1 DRC caches. + * nfsd_drc_pages_used tracks the current version 4.1 DRC memory usage. + */ +spinlock_t nfsd_drc_lock; +unsigned int nfsd_drc_max_mem; +unsigned int nfsd_drc_mem_used; + #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) static struct svc_stat nfsd_acl_svcstats; static struct svc_version * nfsd_acl_version[] = { @@ -235,13 +246,12 @@ void nfsd_reset_versions(void) */ static void set_max_drc(void) { - /* The percent of nr_free_buffer_pages used by the V4.1 server DRC */ - #define NFSD_DRC_SIZE_SHIFT 7 - nfsd_serv->sv_drc_max_pages = nr_free_buffer_pages() - >> NFSD_DRC_SIZE_SHIFT; - nfsd_serv->sv_drc_pages_used = 0; - dprintk("%s svc_drc_max_pages %u\n", __func__, - nfsd_serv->sv_drc_max_pages); + #define NFSD_DRC_SIZE_SHIFT 10 + nfsd_drc_max_mem = (nr_free_buffer_pages() + >> NFSD_DRC_SIZE_SHIFT) * PAGE_SIZE; + nfsd_drc_mem_used = 0; + spin_lock_init(&nfsd_drc_lock); + dprintk("%s nfsd_drc_max_mem %u \n", __func__, nfsd_drc_max_mem); } int nfsd_create_serv(void) @@ -401,7 +411,9 @@ nfsd_svc(unsigned short port, int nrservs) error = nfsd_racache_init(2*nrservs); if (error<0) goto out; - nfs4_state_start(); + error = nfs4_state_start(); + if (error) + goto out; nfsd_reset_versions(); @@ -569,10 +581,6 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp) + rqstp->rq_res.head[0].iov_len; rqstp->rq_res.head[0].iov_len += sizeof(__be32); - /* NFSv4.1 DRC requires statp */ - if (rqstp->rq_vers == 4) - nfsd4_set_statp(rqstp, statp); - /* Now call the procedure handler, and encode NFS status. */ nfserr = proc->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp); nfserr = map_new_errors(rqstp->rq_vers, nfserr); @@ -607,7 +615,25 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp) int nfsd_pool_stats_open(struct inode *inode, struct file *file) { - if (nfsd_serv == NULL) + int ret; + mutex_lock(&nfsd_mutex); + if (nfsd_serv == NULL) { + mutex_unlock(&nfsd_mutex); return -ENODEV; - return svc_pool_stats_open(nfsd_serv, file); + } + /* bump up the psudo refcount while traversing */ + svc_get(nfsd_serv); + ret = svc_pool_stats_open(nfsd_serv, file); + mutex_unlock(&nfsd_mutex); + return ret; +} + +int nfsd_pool_stats_release(struct inode *inode, struct file *file) +{ + int ret = seq_release(inode, file); + mutex_lock(&nfsd_mutex); + /* this function really, really should have been called svc_put() */ + svc_destroy(nfsd_serv); + mutex_unlock(&nfsd_mutex); + return ret; } diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 8fa09bfbcba7f..a293f0273263f 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -89,6 +89,12 @@ struct raparm_hbucket { #define RAPARM_HASH_MASK (RAPARM_HASH_SIZE-1) static struct raparm_hbucket raparm_hash[RAPARM_HASH_SIZE]; +static inline int +nfsd_v4client(struct svc_rqst *rq) +{ + return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4; +} + /* * Called from nfsd_lookup and encode_dirent. Check if we have crossed * a mount point. @@ -115,7 +121,8 @@ nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, path_put(&path); goto out; } - if ((exp->ex_flags & NFSEXP_CROSSMOUNT) || EX_NOHIDE(exp2)) { + if (nfsd_v4client(rqstp) || + (exp->ex_flags & NFSEXP_CROSSMOUNT) || EX_NOHIDE(exp2)) { /* successfully crossed mount point */ /* * This is subtle: path.dentry is *not* on path.mnt diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index ccf2e0dc077a2..a34dea46b6295 100644 --- a/include/linux/lockd/lockd.h +++ b/include/linux/lockd/lockd.h @@ -338,49 +338,6 @@ static inline int nlm_privileged_requester(const struct svc_rqst *rqstp) } } -static inline int __nlm_cmp_addr4(const struct sockaddr *sap1, - const struct sockaddr *sap2) -{ - const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sap1; - const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sap2; - return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; -} - -#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) -static inline int __nlm_cmp_addr6(const struct sockaddr *sap1, - const struct sockaddr *sap2) -{ - const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sap1; - const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sap2; - return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr); -} -#else /* !(CONFIG_IPV6 || CONFIG_IPV6_MODULE) */ -static inline int __nlm_cmp_addr6(const struct sockaddr *sap1, - const struct sockaddr *sap2) -{ - return 0; -} -#endif /* !(CONFIG_IPV6 || CONFIG_IPV6_MODULE) */ - -/* - * Compare two host addresses - * - * Return TRUE if the addresses are the same; otherwise FALSE. - */ -static inline int nlm_cmp_addr(const struct sockaddr *sap1, - const struct sockaddr *sap2) -{ - if (sap1->sa_family == sap2->sa_family) { - switch (sap1->sa_family) { - case AF_INET: - return __nlm_cmp_addr4(sap1, sap2); - case AF_INET6: - return __nlm_cmp_addr6(sap1, sap2); - } - } - return 0; -} - /* * Compare two NLM locks. * When the second lock is of type F_UNLCK, this acts like a wildcard. diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 33b283601f625..c4c060208109b 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -234,7 +234,7 @@ enum nfs_opnum4 { Needs to be updated if more operations are defined in future.*/ #define FIRST_NFS4_OP OP_ACCESS -#define LAST_NFS4_OP OP_RELEASE_LOCKOWNER +#define LAST_NFS4_OP OP_RECLAIM_COMPLETE enum nfsstat4 { NFS4_OK = 0, diff --git a/include/linux/nfsd/nfsd.h b/include/linux/nfsd/nfsd.h index 2b49d676d0c9a..03bbe90391048 100644 --- a/include/linux/nfsd/nfsd.h +++ b/include/linux/nfsd/nfsd.h @@ -56,6 +56,9 @@ extern struct svc_version nfsd_version2, nfsd_version3, extern u32 nfsd_supported_minorversion; extern struct mutex nfsd_mutex; extern struct svc_serv *nfsd_serv; +extern spinlock_t nfsd_drc_lock; +extern unsigned int nfsd_drc_max_mem; +extern unsigned int nfsd_drc_mem_used; extern struct seq_operations nfs_exports_op; @@ -163,7 +166,7 @@ extern int nfsd_max_blksize; extern unsigned int max_delegations; int nfs4_state_init(void); void nfsd4_free_slabs(void); -void nfs4_state_start(void); +int nfs4_state_start(void); void nfs4_state_shutdown(void); time_t nfs4_lease_time(void); void nfs4_reset_lease(time_t leasetime); @@ -171,7 +174,7 @@ int nfs4_reset_recoverydir(char *recdir); #else static inline int nfs4_state_init(void) { return 0; } static inline void nfsd4_free_slabs(void) { } -static inline void nfs4_state_start(void) { } +static inline int nfs4_state_start(void) { return 0; } static inline void nfs4_state_shutdown(void) { } static inline time_t nfs4_lease_time(void) { return 0; } static inline void nfs4_reset_lease(time_t leasetime) { } diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h index 57ab2ed08459c..b38d113241899 100644 --- a/include/linux/nfsd/state.h +++ b/include/linux/nfsd/state.h @@ -60,6 +60,12 @@ typedef struct { #define si_stateownerid si_opaque.so_stateownerid #define si_fileid si_opaque.so_fileid +struct nfsd4_cb_sequence { + /* args/res */ + u32 cbs_minorversion; + struct nfs4_client *cbs_clp; +}; + struct nfs4_delegation { struct list_head dl_perfile; struct list_head dl_perclnt; @@ -81,38 +87,35 @@ struct nfs4_delegation { /* client delegation callback info */ struct nfs4_cb_conn { /* SETCLIENTID info */ - u32 cb_addr; - unsigned short cb_port; + struct sockaddr_storage cb_addr; + size_t cb_addrlen; u32 cb_prog; u32 cb_minorversion; u32 cb_ident; /* minorversion 0 only */ /* RPC client info */ atomic_t cb_set; /* successful CB_NULL call */ struct rpc_clnt * cb_client; - struct rpc_cred * cb_cred; }; -/* Maximum number of slots per session. 128 is useful for long haul TCP */ -#define NFSD_MAX_SLOTS_PER_SESSION 128 -/* Maximum number of pages per slot cache entry */ -#define NFSD_PAGES_PER_SLOT 1 +/* Maximum number of slots per session. 160 is useful for long haul TCP */ +#define NFSD_MAX_SLOTS_PER_SESSION 160 /* Maximum number of operations per session compound */ #define NFSD_MAX_OPS_PER_COMPOUND 16 - -struct nfsd4_cache_entry { - __be32 ce_status; - struct kvec ce_datav; /* encoded NFSv4.1 data in rq_res.head[0] */ - struct page *ce_respages[NFSD_PAGES_PER_SLOT + 1]; - int ce_cachethis; - short ce_resused; - int ce_opcnt; - int ce_rpchdrlen; -}; +/* Maximum session per slot cache size */ +#define NFSD_SLOT_CACHE_SIZE 1024 +/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */ +#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32 +#define NFSD_MAX_MEM_PER_SESSION \ + (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE) struct nfsd4_slot { - bool sl_inuse; - u32 sl_seqid; - struct nfsd4_cache_entry sl_cache_entry; + bool sl_inuse; + bool sl_cachethis; + u16 sl_opcnt; + u32 sl_seqid; + __be32 sl_status; + u32 sl_datalen; + char sl_data[]; }; struct nfsd4_channel_attrs { @@ -126,6 +129,25 @@ struct nfsd4_channel_attrs { u32 rdma_attrs; }; +struct nfsd4_create_session { + clientid_t clientid; + struct nfs4_sessionid sessionid; + u32 seqid; + u32 flags; + struct nfsd4_channel_attrs fore_channel; + struct nfsd4_channel_attrs back_channel; + u32 callback_prog; + u32 uid; + u32 gid; +}; + +/* The single slot clientid cache structure */ +struct nfsd4_clid_slot { + u32 sl_seqid; + __be32 sl_status; + struct nfsd4_create_session sl_cr_ses; +}; + struct nfsd4_session { struct kref se_ref; struct list_head se_hash; /* hash by sessionid */ @@ -135,7 +157,7 @@ struct nfsd4_session { struct nfs4_sessionid se_sessionid; struct nfsd4_channel_attrs se_fchannel; struct nfsd4_channel_attrs se_bchannel; - struct nfsd4_slot se_slots[]; /* forward channel slots */ + struct nfsd4_slot *se_slots[]; /* forward channel slots */ }; static inline void @@ -180,7 +202,7 @@ struct nfs4_client { char cl_recdir[HEXDIR_LEN]; /* recovery dir */ nfs4_verifier cl_verifier; /* generated by client */ time_t cl_time; /* time of last lease renewal */ - __be32 cl_addr; /* client ipaddress */ + struct sockaddr_storage cl_addr; /* client ipaddress */ u32 cl_flavor; /* setclientid pseudoflavor */ char *cl_principal; /* setclientid principal name */ struct svc_cred cl_cred; /* setclientid principal */ @@ -192,9 +214,17 @@ struct nfs4_client { /* for nfs41 */ struct list_head cl_sessions; - struct nfsd4_slot cl_slot; /* create_session slot */ + struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */ u32 cl_exchange_flags; struct nfs4_sessionid cl_sessionid; + + /* for nfs41 callbacks */ + /* We currently support a single back channel with a single slot */ + unsigned long cl_cb_slot_busy; + u32 cl_cb_seq_nr; + struct svc_xprt *cl_cb_xprt; /* 4.1 callback transport */ + struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */ + /* wait here for slots */ }; /* struct nfs4_client_reset @@ -345,6 +375,7 @@ extern int nfs4_in_grace(void); extern __be32 nfs4_check_open_reclaim(clientid_t *clid); extern void put_nfs4_client(struct nfs4_client *clp); extern void nfs4_free_stateowner(struct kref *kref); +extern int set_callback_cred(void); extern void nfsd4_probe_callback(struct nfs4_client *clp); extern void nfsd4_cb_recall(struct nfs4_delegation *dp); extern void nfs4_put_delegation(struct nfs4_delegation *dp); diff --git a/include/linux/nfsd/xdr4.h b/include/linux/nfsd/xdr4.h index 2bacf75350696..73164c2b3d295 100644 --- a/include/linux/nfsd/xdr4.h +++ b/include/linux/nfsd/xdr4.h @@ -51,7 +51,7 @@ struct nfsd4_compound_state { /* For sessions DRC */ struct nfsd4_session *session; struct nfsd4_slot *slot; - __be32 *statp; + __be32 *datap; size_t iovlen; u32 minorversion; u32 status; @@ -366,18 +366,6 @@ struct nfsd4_exchange_id { int spa_how; }; -struct nfsd4_create_session { - clientid_t clientid; - struct nfs4_sessionid sessionid; - u32 seqid; - u32 flags; - struct nfsd4_channel_attrs fore_channel; - struct nfsd4_channel_attrs back_channel; - u32 callback_prog; - u32 uid; - u32 gid; -}; - struct nfsd4_sequence { struct nfs4_sessionid sessionid; /* request/response */ u32 seqid; /* request/response */ @@ -479,13 +467,12 @@ struct nfsd4_compoundres { static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp) { struct nfsd4_compoundargs *args = resp->rqstp->rq_argp; - return args->opcnt == 1; + return resp->opcnt == 1 && args->ops[0].opnum == OP_SEQUENCE; } static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp) { - return !resp->cstate.slot->sl_cache_entry.ce_cachethis || - nfsd4_is_solo_sequence(resp); + return !resp->cstate.slot->sl_cachethis || nfsd4_is_solo_sequence(resp); } #define NFS4_SVC_XDRSIZE sizeof(struct nfsd4_compoundargs) diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h index 3f632182d8eb0..996df4dac7d47 100644 --- a/include/linux/sunrpc/auth.h +++ b/include/linux/sunrpc/auth.h @@ -111,7 +111,7 @@ struct rpc_credops { void (*crdestroy)(struct rpc_cred *); int (*crmatch)(struct auth_cred *, struct rpc_cred *, int); - void (*crbind)(struct rpc_task *, struct rpc_cred *); + void (*crbind)(struct rpc_task *, struct rpc_cred *, int); __be32 * (*crmarshal)(struct rpc_task *, __be32 *); int (*crrefresh)(struct rpc_task *); __be32 * (*crvalidate)(struct rpc_task *, __be32 *); @@ -140,7 +140,7 @@ struct rpc_cred * rpcauth_lookup_credcache(struct rpc_auth *, struct auth_cred * void rpcauth_init_cred(struct rpc_cred *, const struct auth_cred *, struct rpc_auth *, const struct rpc_credops *); struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int); void rpcauth_bindcred(struct rpc_task *, struct rpc_cred *, int); -void rpcauth_generic_bind_cred(struct rpc_task *, struct rpc_cred *); +void rpcauth_generic_bind_cred(struct rpc_task *, struct rpc_cred *, int); void put_rpccred(struct rpc_cred *); void rpcauth_unbindcred(struct rpc_task *); __be32 * rpcauth_marshcred(struct rpc_task *, __be32 *); diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h index ab3f6e90caa5f..8ed9642a5a766 100644 --- a/include/linux/sunrpc/clnt.h +++ b/include/linux/sunrpc/clnt.h @@ -22,6 +22,7 @@ #include <linux/sunrpc/timer.h> #include <asm/signal.h> #include <linux/path.h> +#include <net/ipv6.h> struct rpc_inode; @@ -113,6 +114,7 @@ struct rpc_create_args { rpc_authflavor_t authflavor; unsigned long flags; char *client_name; + struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */ }; /* Values for "flags" field */ @@ -188,5 +190,117 @@ static inline void rpc_set_port(struct sockaddr *sap, #define IPV6_SCOPE_DELIMITER '%' #define IPV6_SCOPE_ID_LEN sizeof("%nnnnnnnnnn") +static inline bool __rpc_cmp_addr4(const struct sockaddr *sap1, + const struct sockaddr *sap2) +{ + const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sap1; + const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sap2; + + return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr; +} + +static inline bool __rpc_copy_addr4(struct sockaddr *dst, + const struct sockaddr *src) +{ + const struct sockaddr_in *ssin = (struct sockaddr_in *) src; + struct sockaddr_in *dsin = (struct sockaddr_in *) dst; + + dsin->sin_family = ssin->sin_family; + dsin->sin_addr.s_addr = ssin->sin_addr.s_addr; + return true; +} + +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) +static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1, + const struct sockaddr *sap2) +{ + const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sap1; + const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sap2; + return ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr); +} + +static inline bool __rpc_copy_addr6(struct sockaddr *dst, + const struct sockaddr *src) +{ + const struct sockaddr_in6 *ssin6 = (const struct sockaddr_in6 *) src; + struct sockaddr_in6 *dsin6 = (struct sockaddr_in6 *) dst; + + dsin6->sin6_family = ssin6->sin6_family; + ipv6_addr_copy(&dsin6->sin6_addr, &ssin6->sin6_addr); + return true; +} +#else /* !(CONFIG_IPV6 || CONFIG_IPV6_MODULE) */ +static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1, + const struct sockaddr *sap2) +{ + return false; +} + +static inline bool __rpc_copy_addr6(struct sockaddr *dst, + const struct sockaddr *src) +{ + return false; +} +#endif /* !(CONFIG_IPV6 || CONFIG_IPV6_MODULE) */ + +/** + * rpc_cmp_addr - compare the address portion of two sockaddrs. + * @sap1: first sockaddr + * @sap2: second sockaddr + * + * Just compares the family and address portion. Ignores port, scope, etc. + * Returns true if the addrs are equal, false if they aren't. + */ +static inline bool rpc_cmp_addr(const struct sockaddr *sap1, + const struct sockaddr *sap2) +{ + if (sap1->sa_family == sap2->sa_family) { + switch (sap1->sa_family) { + case AF_INET: + return __rpc_cmp_addr4(sap1, sap2); + case AF_INET6: + return __rpc_cmp_addr6(sap1, sap2); + } + } + return false; +} + +/** + * rpc_copy_addr - copy the address portion of one sockaddr to another + * @dst: destination sockaddr + * @src: source sockaddr + * + * Just copies the address portion and family. Ignores port, scope, etc. + * Caller is responsible for making certain that dst is large enough to hold + * the address in src. Returns true if address family is supported. Returns + * false otherwise. + */ +static inline bool rpc_copy_addr(struct sockaddr *dst, + const struct sockaddr *src) +{ + switch (src->sa_family) { + case AF_INET: + return __rpc_copy_addr4(dst, src); + case AF_INET6: + return __rpc_copy_addr6(dst, src); + } + return false; +} + +/** + * rpc_get_scope_id - return scopeid for a given sockaddr + * @sa: sockaddr to get scopeid from + * + * Returns the value of the sin6_scope_id for AF_INET6 addrs, or 0 if + * not an AF_INET6 address. + */ +static inline u32 rpc_get_scope_id(const struct sockaddr *sa) +{ + if (sa->sa_family != AF_INET6) + return 0; + + return ((struct sockaddr_in6 *) sa)->sin6_scope_id; +} + #endif /* __KERNEL__ */ #endif /* _LINUX_SUNRPC_CLNT_H */ diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h index ea8009695c69b..52e8cb0a75699 100644 --- a/include/linux/sunrpc/svc.h +++ b/include/linux/sunrpc/svc.h @@ -94,8 +94,6 @@ struct svc_serv { struct module * sv_module; /* optional module to count when * adding threads */ svc_thread_fn sv_function; /* main function for threads */ - unsigned int sv_drc_max_pages; /* Total pages for DRC */ - unsigned int sv_drc_pages_used;/* DRC pages used */ #if defined(CONFIG_NFS_V4_1) struct list_head sv_cb_list; /* queue for callback requests * that arrive over the same diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h index 2223ae0b5ed57..5f4e18b3ce73d 100644 --- a/include/linux/sunrpc/svc_xprt.h +++ b/include/linux/sunrpc/svc_xprt.h @@ -65,6 +65,7 @@ struct svc_xprt { size_t xpt_locallen; /* length of address */ struct sockaddr_storage xpt_remote; /* remote peer's address */ size_t xpt_remotelen; /* length of address */ + struct rpc_wait_queue xpt_bc_pending; /* backchannel wait queue */ }; int svc_reg_xprt_class(struct svc_xprt_class *); diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h index 04dba23c59f2c..1b353a76c3049 100644 --- a/include/linux/sunrpc/svcsock.h +++ b/include/linux/sunrpc/svcsock.h @@ -28,6 +28,7 @@ struct svc_sock { /* private TCP part */ u32 sk_reclen; /* length of record */ u32 sk_tcplen; /* current read length */ + struct rpc_xprt *sk_bc_xprt; /* NFSv4.1 backchannel xprt */ }; /* diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index c090df442572c..6f9457a75b8f0 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -124,6 +124,23 @@ struct rpc_xprt_ops { void (*print_stats)(struct rpc_xprt *xprt, struct seq_file *seq); }; +/* + * RPC transport identifiers + * + * To preserve compatibility with the historical use of raw IP protocol + * id's for transport selection, UDP and TCP identifiers are specified + * with the previous values. No such restriction exists for new transports, + * except that they may not collide with these values (17 and 6, + * respectively). + */ +#define XPRT_TRANSPORT_BC (1 << 31) +enum xprt_transports { + XPRT_TRANSPORT_UDP = IPPROTO_UDP, + XPRT_TRANSPORT_TCP = IPPROTO_TCP, + XPRT_TRANSPORT_BC_TCP = IPPROTO_TCP | XPRT_TRANSPORT_BC, + XPRT_TRANSPORT_RDMA = 256 +}; + struct rpc_xprt { struct kref kref; /* Reference count */ struct rpc_xprt_ops * ops; /* transport methods */ @@ -179,6 +196,7 @@ struct rpc_xprt { spinlock_t reserve_lock; /* lock slot table */ u32 xid; /* Next XID value to use */ struct rpc_task * snd_task; /* Task blocked in send */ + struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */ #if defined(CONFIG_NFS_V4_1) struct svc_serv *bc_serv; /* The RPC service which will */ /* process the callback */ @@ -231,6 +249,7 @@ struct xprt_create { struct sockaddr * srcaddr; /* optional local address */ struct sockaddr * dstaddr; /* remote peer address */ size_t addrlen; + struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */ }; struct xprt_class { diff --git a/include/linux/sunrpc/xprtrdma.h b/include/linux/sunrpc/xprtrdma.h index 54a379c9e8ebd..c2f04e1ae1597 100644 --- a/include/linux/sunrpc/xprtrdma.h +++ b/include/linux/sunrpc/xprtrdma.h @@ -41,11 +41,6 @@ #define _LINUX_SUNRPC_XPRTRDMA_H /* - * RPC transport identifier for RDMA - */ -#define XPRT_TRANSPORT_RDMA 256 - -/* * rpcbind (v3+) RDMA netid. */ #define RPCBIND_NETID_RDMA "rdma" diff --git a/include/linux/sunrpc/xprtsock.h b/include/linux/sunrpc/xprtsock.h index c2a46c45c8f75..3f14a02e9cc02 100644 --- a/include/linux/sunrpc/xprtsock.h +++ b/include/linux/sunrpc/xprtsock.h @@ -13,17 +13,6 @@ int init_socket_xprt(void); void cleanup_socket_xprt(void); /* - * RPC transport identifiers for UDP, TCP - * - * To preserve compatibility with the historical use of raw IP protocol - * id's for transport selection, these are specified with the previous - * values. No such restriction exists for new transports, except that - * they may not collide with these values (17 and 6, respectively). - */ -#define XPRT_TRANSPORT_UDP IPPROTO_UDP -#define XPRT_TRANSPORT_TCP IPPROTO_TCP - -/* * RPC slot table sizes for UDP, TCP transports */ extern unsigned int xprt_udp_slot_table_entries; diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c index 0c431c277af5b..54a4e042f1045 100644 --- a/net/sunrpc/auth.c +++ b/net/sunrpc/auth.c @@ -385,7 +385,7 @@ rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred, EXPORT_SYMBOL_GPL(rpcauth_init_cred); void -rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred) +rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred, int lookupflags) { task->tk_msg.rpc_cred = get_rpccred(cred); dprintk("RPC: %5u holding %s cred %p\n", task->tk_pid, @@ -394,7 +394,7 @@ rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred) EXPORT_SYMBOL_GPL(rpcauth_generic_bind_cred); static void -rpcauth_bind_root_cred(struct rpc_task *task) +rpcauth_bind_root_cred(struct rpc_task *task, int lookupflags) { struct rpc_auth *auth = task->tk_client->cl_auth; struct auth_cred acred = { @@ -405,7 +405,7 @@ rpcauth_bind_root_cred(struct rpc_task *task) dprintk("RPC: %5u looking up %s cred\n", task->tk_pid, task->tk_client->cl_auth->au_ops->au_name); - ret = auth->au_ops->lookup_cred(auth, &acred, 0); + ret = auth->au_ops->lookup_cred(auth, &acred, lookupflags); if (!IS_ERR(ret)) task->tk_msg.rpc_cred = ret; else @@ -413,14 +413,14 @@ rpcauth_bind_root_cred(struct rpc_task *task) } static void -rpcauth_bind_new_cred(struct rpc_task *task) +rpcauth_bind_new_cred(struct rpc_task *task, int lookupflags) { struct rpc_auth *auth = task->tk_client->cl_auth; struct rpc_cred *ret; dprintk("RPC: %5u looking up %s cred\n", task->tk_pid, auth->au_ops->au_name); - ret = rpcauth_lookupcred(auth, 0); + ret = rpcauth_lookupcred(auth, lookupflags); if (!IS_ERR(ret)) task->tk_msg.rpc_cred = ret; else @@ -430,12 +430,16 @@ rpcauth_bind_new_cred(struct rpc_task *task) void rpcauth_bindcred(struct rpc_task *task, struct rpc_cred *cred, int flags) { + int lookupflags = 0; + + if (flags & RPC_TASK_ASYNC) + lookupflags |= RPCAUTH_LOOKUP_NEW; if (cred != NULL) - cred->cr_ops->crbind(task, cred); + cred->cr_ops->crbind(task, cred, lookupflags); else if (flags & RPC_TASK_ROOTCREDS) - rpcauth_bind_root_cred(task); + rpcauth_bind_root_cred(task, lookupflags); else - rpcauth_bind_new_cred(task); + rpcauth_bind_new_cred(task, lookupflags); } void diff --git a/net/sunrpc/auth_generic.c b/net/sunrpc/auth_generic.c index 4028502f05285..bf88bf8e9365a 100644 --- a/net/sunrpc/auth_generic.c +++ b/net/sunrpc/auth_generic.c @@ -55,13 +55,13 @@ struct rpc_cred *rpc_lookup_machine_cred(void) EXPORT_SYMBOL_GPL(rpc_lookup_machine_cred); static void -generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred) +generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred, int lookupflags) { struct rpc_auth *auth = task->tk_client->cl_auth; struct auth_cred *acred = &container_of(cred, struct generic_cred, gc_base)->acred; struct rpc_cred *ret; - ret = auth->au_ops->lookup_cred(auth, acred, 0); + ret = auth->au_ops->lookup_cred(auth, acred, lookupflags); if (!IS_ERR(ret)) task->tk_msg.rpc_cred = ret; else diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 2e6a148d277c3..f6c51e562a02d 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -1374,8 +1374,10 @@ svcauth_gss_release(struct svc_rqst *rqstp) if (stat) goto out_err; break; - default: - goto out_err; + /* + * For any other gc_svc value, svcauth_gss_accept() already set + * the auth_error appropriately; just fall through: + */ } out: diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index 45cdaff9b361c..d6eee291a0e2b 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -103,23 +103,21 @@ struct cache_head *sunrpc_cache_lookup(struct cache_detail *detail, EXPORT_SYMBOL_GPL(sunrpc_cache_lookup); -static void queue_loose(struct cache_detail *detail, struct cache_head *ch); +static void cache_dequeue(struct cache_detail *detail, struct cache_head *ch); -static int cache_fresh_locked(struct cache_head *head, time_t expiry) +static void cache_fresh_locked(struct cache_head *head, time_t expiry) { head->expiry_time = expiry; head->last_refresh = get_seconds(); - return !test_and_set_bit(CACHE_VALID, &head->flags); + set_bit(CACHE_VALID, &head->flags); } static void cache_fresh_unlocked(struct cache_head *head, - struct cache_detail *detail, int new) + struct cache_detail *detail) { - if (new) - cache_revisit_request(head); if (test_and_clear_bit(CACHE_PENDING, &head->flags)) { cache_revisit_request(head); - queue_loose(detail, head); + cache_dequeue(detail, head); } } @@ -132,7 +130,6 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail, */ struct cache_head **head; struct cache_head *tmp; - int is_new; if (!test_bit(CACHE_VALID, &old->flags)) { write_lock(&detail->hash_lock); @@ -141,9 +138,9 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail, set_bit(CACHE_NEGATIVE, &old->flags); else detail->update(old, new); - is_new = cache_fresh_locked(old, new->expiry_time); + cache_fresh_locked(old, new->expiry_time); write_unlock(&detail->hash_lock); - cache_fresh_unlocked(old, detail, is_new); + cache_fresh_unlocked(old, detail); return old; } write_unlock(&detail->hash_lock); @@ -167,11 +164,11 @@ struct cache_head *sunrpc_cache_update(struct cache_detail *detail, *head = tmp; detail->entries++; cache_get(tmp); - is_new = cache_fresh_locked(tmp, new->expiry_time); + cache_fresh_locked(tmp, new->expiry_time); cache_fresh_locked(old, 0); write_unlock(&detail->hash_lock); - cache_fresh_unlocked(tmp, detail, is_new); - cache_fresh_unlocked(old, detail, 0); + cache_fresh_unlocked(tmp, detail); + cache_fresh_unlocked(old, detail); cache_put(old, detail); return tmp; } @@ -184,6 +181,22 @@ static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h) return cd->cache_upcall(cd, h); } +static inline int cache_is_valid(struct cache_detail *detail, struct cache_head *h) +{ + if (!test_bit(CACHE_VALID, &h->flags) || + h->expiry_time < get_seconds()) + return -EAGAIN; + else if (detail->flush_time > h->last_refresh) + return -EAGAIN; + else { + /* entry is valid */ + if (test_bit(CACHE_NEGATIVE, &h->flags)) + return -ENOENT; + else + return 0; + } +} + /* * This is the generic cache management routine for all * the authentication caches. @@ -192,8 +205,10 @@ static int cache_make_upcall(struct cache_detail *cd, struct cache_head *h) * * * Returns 0 if the cache_head can be used, or cache_puts it and returns - * -EAGAIN if upcall is pending, - * -ETIMEDOUT if upcall failed and should be retried, + * -EAGAIN if upcall is pending and request has been queued + * -ETIMEDOUT if upcall failed or request could not be queue or + * upcall completed but item is still invalid (implying that + * the cache item has been replaced with a newer one). * -ENOENT if cache entry was negative */ int cache_check(struct cache_detail *detail, @@ -203,17 +218,7 @@ int cache_check(struct cache_detail *detail, long refresh_age, age; /* First decide return status as best we can */ - if (!test_bit(CACHE_VALID, &h->flags) || - h->expiry_time < get_seconds()) - rv = -EAGAIN; - else if (detail->flush_time > h->last_refresh) - rv = -EAGAIN; - else { - /* entry is valid */ - if (test_bit(CACHE_NEGATIVE, &h->flags)) - rv = -ENOENT; - else rv = 0; - } + rv = cache_is_valid(detail, h); /* now see if we want to start an upcall */ refresh_age = (h->expiry_time - h->last_refresh); @@ -229,10 +234,11 @@ int cache_check(struct cache_detail *detail, switch (cache_make_upcall(detail, h)) { case -EINVAL: clear_bit(CACHE_PENDING, &h->flags); + cache_revisit_request(h); if (rv == -EAGAIN) { set_bit(CACHE_NEGATIVE, &h->flags); - cache_fresh_unlocked(h, detail, - cache_fresh_locked(h, get_seconds()+CACHE_NEW_EXPIRY)); + cache_fresh_locked(h, get_seconds()+CACHE_NEW_EXPIRY); + cache_fresh_unlocked(h, detail); rv = -ENOENT; } break; @@ -245,10 +251,14 @@ int cache_check(struct cache_detail *detail, } } - if (rv == -EAGAIN) - if (cache_defer_req(rqstp, h) != 0) - rv = -ETIMEDOUT; - + if (rv == -EAGAIN) { + if (cache_defer_req(rqstp, h) < 0) { + /* Request is not deferred */ + rv = cache_is_valid(detail, h); + if (rv == -EAGAIN) + rv = -ETIMEDOUT; + } + } if (rv) cache_put(h, detail); return rv; @@ -396,7 +406,7 @@ static int cache_clean(void) ) continue; if (test_and_clear_bit(CACHE_PENDING, &ch->flags)) - queue_loose(current_detail, ch); + cache_dequeue(current_detail, ch); if (atomic_read(&ch->ref.refcount) == 1) break; @@ -412,8 +422,10 @@ static int cache_clean(void) if (!ch) current_index ++; spin_unlock(&cache_list_lock); - if (ch) + if (ch) { + cache_revisit_request(ch); cache_put(ch, d); + } } else spin_unlock(&cache_list_lock); @@ -488,7 +500,7 @@ static int cache_defer_cnt; static int cache_defer_req(struct cache_req *req, struct cache_head *item) { - struct cache_deferred_req *dreq; + struct cache_deferred_req *dreq, *discard; int hash = DFR_HASH(item); if (cache_defer_cnt >= DFR_MAX) { @@ -496,11 +508,11 @@ static int cache_defer_req(struct cache_req *req, struct cache_head *item) * or continue and drop the oldest below */ if (net_random()&1) - return -ETIMEDOUT; + return -ENOMEM; } dreq = req->defer(req); if (dreq == NULL) - return -ETIMEDOUT; + return -ENOMEM; dreq->item = item; @@ -513,23 +525,24 @@ static int cache_defer_req(struct cache_req *req, struct cache_head *item) list_add(&dreq->hash, &cache_defer_hash[hash]); /* it is in, now maybe clean up */ - dreq = NULL; + discard = NULL; if (++cache_defer_cnt > DFR_MAX) { - dreq = list_entry(cache_defer_list.prev, - struct cache_deferred_req, recent); - list_del(&dreq->recent); - list_del(&dreq->hash); + discard = list_entry(cache_defer_list.prev, + struct cache_deferred_req, recent); + list_del_init(&discard->recent); + list_del_init(&discard->hash); cache_defer_cnt--; } spin_unlock(&cache_defer_lock); - if (dreq) { + if (discard) /* there was one too many */ - dreq->revisit(dreq, 1); - } + discard->revisit(discard, 1); + if (!test_bit(CACHE_PENDING, &item->flags)) { /* must have just been validated... */ cache_revisit_request(item); + return -EAGAIN; } return 0; } @@ -551,7 +564,7 @@ static void cache_revisit_request(struct cache_head *item) dreq = list_entry(lp, struct cache_deferred_req, hash); lp = lp->next; if (dreq->item == item) { - list_del(&dreq->hash); + list_del_init(&dreq->hash); list_move(&dreq->recent, &pending); cache_defer_cnt--; } @@ -577,7 +590,7 @@ void cache_clean_deferred(void *owner) list_for_each_entry_safe(dreq, tmp, &cache_defer_list, recent) { if (dreq->owner == owner) { - list_del(&dreq->hash); + list_del_init(&dreq->hash); list_move(&dreq->recent, &pending); cache_defer_cnt--; } @@ -887,7 +900,7 @@ static int cache_release(struct inode *inode, struct file *filp, -static void queue_loose(struct cache_detail *detail, struct cache_head *ch) +static void cache_dequeue(struct cache_detail *detail, struct cache_head *ch) { struct cache_queue *cq; spin_lock(&queue_lock); diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index fac0ca93f06be..a417d5ab5dd75 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -288,6 +288,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args) .srcaddr = args->saddress, .dstaddr = args->address, .addrlen = args->addrsize, + .bc_xprt = args->bc_xprt, }; char servername[48]; diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index 8f459abe97cff..cef74ba0666c2 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -21,6 +21,8 @@ #include <linux/sunrpc/clnt.h> +#include "sunrpc.h" + #ifdef RPC_DEBUG #define RPCDBG_FACILITY RPCDBG_SCHED #define RPC_TASK_MAGIC_ID 0xf00baa @@ -711,11 +713,6 @@ static void rpc_async_schedule(struct work_struct *work) __rpc_execute(container_of(work, struct rpc_task, u.tk_work)); } -struct rpc_buffer { - size_t len; - char data[]; -}; - /** * rpc_malloc - allocate an RPC buffer * @task: RPC task that will use this buffer diff --git a/net/sunrpc/sunrpc.h b/net/sunrpc/sunrpc.h index 5d9dd742264ba..90c292e2738b5 100644 --- a/net/sunrpc/sunrpc.h +++ b/net/sunrpc/sunrpc.h @@ -27,11 +27,25 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #ifndef _NET_SUNRPC_SUNRPC_H #define _NET_SUNRPC_SUNRPC_H +#include <linux/net.h> + +/* + * Header for dynamically allocated rpc buffers. + */ +struct rpc_buffer { + size_t len; + char data[]; +}; + static inline int rpc_reply_expected(struct rpc_task *task) { return (task->tk_msg.rpc_proc != NULL) && (task->tk_msg.rpc_proc->p_decode != NULL); } +int svc_send_common(struct socket *sock, struct xdr_buf *xdr, + struct page *headpage, unsigned long headoffset, + struct page *tailpage, unsigned long tailoffset); + #endif /* _NET_SUNRPC_SUNRPC_H */ diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 27d44332f0175..df124f78ee489 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -160,6 +160,7 @@ void svc_xprt_init(struct svc_xprt_class *xcl, struct svc_xprt *xprt, mutex_init(&xprt->xpt_mutex); spin_lock_init(&xprt->xpt_lock); set_bit(XPT_BUSY, &xprt->xpt_flags); + rpc_init_wait_queue(&xprt->xpt_bc_pending, "xpt_bc_pending"); } EXPORT_SYMBOL_GPL(svc_xprt_init); @@ -710,10 +711,7 @@ int svc_recv(struct svc_rqst *rqstp, long timeout) spin_unlock_bh(&pool->sp_lock); len = 0; - if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) { - dprintk("svc_recv: found XPT_CLOSE\n"); - svc_delete_xprt(xprt); - } else if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) { + if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) { struct svc_xprt *newxpt; newxpt = xprt->xpt_ops->xpo_accept(xprt); if (newxpt) { @@ -739,7 +737,7 @@ int svc_recv(struct svc_rqst *rqstp, long timeout) svc_xprt_received(newxpt); } svc_xprt_received(xprt); - } else { + } else if (!test_bit(XPT_CLOSE, &xprt->xpt_flags)) { dprintk("svc: server %p, pool %u, transport %p, inuse=%d\n", rqstp, pool->sp_id, xprt, atomic_read(&xprt->xpt_ref.refcount)); @@ -752,6 +750,11 @@ int svc_recv(struct svc_rqst *rqstp, long timeout) dprintk("svc: got len=%d\n", len); } + if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) { + dprintk("svc_recv: found XPT_CLOSE\n"); + svc_delete_xprt(xprt); + } + /* No data, incomplete (TCP) read, or accept() */ if (len == 0 || len == -EAGAIN) { rqstp->rq_res.len = 0; @@ -808,6 +811,7 @@ int svc_send(struct svc_rqst *rqstp) else len = xprt->xpt_ops->xpo_sendto(rqstp); mutex_unlock(&xprt->xpt_mutex); + rpc_wake_up(&xprt->xpt_bc_pending); svc_xprt_release(rqstp); if (len == -ECONNREFUSED || len == -ENOTCONN || len == -EAGAIN) @@ -1166,11 +1170,6 @@ static void *svc_pool_stats_start(struct seq_file *m, loff_t *pos) dprintk("svc_pool_stats_start, *pidx=%u\n", pidx); - lock_kernel(); - /* bump up the pseudo refcount while traversing */ - svc_get(serv); - unlock_kernel(); - if (!pidx) return SEQ_START_TOKEN; return (pidx > serv->sv_nrpools ? NULL : &serv->sv_pools[pidx-1]); @@ -1198,12 +1197,6 @@ static void *svc_pool_stats_next(struct seq_file *m, void *p, loff_t *pos) static void svc_pool_stats_stop(struct seq_file *m, void *p) { - struct svc_serv *serv = m->private; - - lock_kernel(); - /* this function really, really should have been called svc_put() */ - svc_destroy(serv); - unlock_kernel(); } static int svc_pool_stats_show(struct seq_file *m, void *p) diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c index 6caffa34ac016..117f68a8aa40c 100644 --- a/net/sunrpc/svcauth_unix.c +++ b/net/sunrpc/svcauth_unix.c @@ -668,6 +668,7 @@ static int unix_gid_find(uid_t uid, struct group_info **gip, case 0: *gip = ug->gi; get_group_info(*gip); + cache_put(&ug->h, &unix_gid_cache); return 0; default: return -EAGAIN; diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 23128ee191ae7..ccc5e83cae5d2 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -49,6 +49,7 @@ #include <linux/sunrpc/msg_prot.h> #include <linux/sunrpc/svcsock.h> #include <linux/sunrpc/stats.h> +#include <linux/sunrpc/xprt.h> #define RPCDBG_FACILITY RPCDBG_SVCXPRT @@ -153,49 +154,27 @@ static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh) } /* - * Generic sendto routine + * send routine intended to be shared by the fore- and back-channel */ -static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr) +int svc_send_common(struct socket *sock, struct xdr_buf *xdr, + struct page *headpage, unsigned long headoffset, + struct page *tailpage, unsigned long tailoffset) { - struct svc_sock *svsk = - container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); - struct socket *sock = svsk->sk_sock; - int slen; - union { - struct cmsghdr hdr; - long all[SVC_PKTINFO_SPACE / sizeof(long)]; - } buffer; - struct cmsghdr *cmh = &buffer.hdr; - int len = 0; int result; int size; struct page **ppage = xdr->pages; size_t base = xdr->page_base; unsigned int pglen = xdr->page_len; unsigned int flags = MSG_MORE; - RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); + int slen; + int len = 0; slen = xdr->len; - if (rqstp->rq_prot == IPPROTO_UDP) { - struct msghdr msg = { - .msg_name = &rqstp->rq_addr, - .msg_namelen = rqstp->rq_addrlen, - .msg_control = cmh, - .msg_controllen = sizeof(buffer), - .msg_flags = MSG_MORE, - }; - - svc_set_cmsg_data(rqstp, cmh); - - if (sock_sendmsg(sock, &msg, 0) < 0) - goto out; - } - /* send head */ if (slen == xdr->head[0].iov_len) flags = 0; - len = kernel_sendpage(sock, rqstp->rq_respages[0], 0, + len = kernel_sendpage(sock, headpage, headoffset, xdr->head[0].iov_len, flags); if (len != xdr->head[0].iov_len) goto out; @@ -219,16 +198,58 @@ static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr) base = 0; ppage++; } + /* send tail */ if (xdr->tail[0].iov_len) { - result = kernel_sendpage(sock, rqstp->rq_respages[0], - ((unsigned long)xdr->tail[0].iov_base) - & (PAGE_SIZE-1), - xdr->tail[0].iov_len, 0); - + result = kernel_sendpage(sock, tailpage, tailoffset, + xdr->tail[0].iov_len, 0); if (result > 0) len += result; } + +out: + return len; +} + + +/* + * Generic sendto routine + */ +static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr) +{ + struct svc_sock *svsk = + container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); + struct socket *sock = svsk->sk_sock; + union { + struct cmsghdr hdr; + long all[SVC_PKTINFO_SPACE / sizeof(long)]; + } buffer; + struct cmsghdr *cmh = &buffer.hdr; + int len = 0; + unsigned long tailoff; + unsigned long headoff; + RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); + + if (rqstp->rq_prot == IPPROTO_UDP) { + struct msghdr msg = { + .msg_name = &rqstp->rq_addr, + .msg_namelen = rqstp->rq_addrlen, + .msg_control = cmh, + .msg_controllen = sizeof(buffer), + .msg_flags = MSG_MORE, + }; + + svc_set_cmsg_data(rqstp, cmh); + + if (sock_sendmsg(sock, &msg, 0) < 0) + goto out; + } + + tailoff = ((unsigned long)xdr->tail[0].iov_base) & (PAGE_SIZE-1); + headoff = 0; + len = svc_send_common(sock, xdr, rqstp->rq_respages[0], headoff, + rqstp->rq_respages[0], tailoff); + out: dprintk("svc: socket %p sendto([%p %Zu... ], %d) = %d (addr %s)\n", svsk, xdr->head[0].iov_base, xdr->head[0].iov_len, @@ -432,29 +453,49 @@ static void svc_tcp_write_space(struct sock *sk) } /* + * See net/ipv6/ip_sockglue.c : ip_cmsg_recv_pktinfo + */ +static int svc_udp_get_dest_address4(struct svc_rqst *rqstp, + struct cmsghdr *cmh) +{ + struct in_pktinfo *pki = CMSG_DATA(cmh); + if (cmh->cmsg_type != IP_PKTINFO) + return 0; + rqstp->rq_daddr.addr.s_addr = pki->ipi_spec_dst.s_addr; + return 1; +} + +/* + * See net/ipv6/datagram.c : datagram_recv_ctl + */ +static int svc_udp_get_dest_address6(struct svc_rqst *rqstp, + struct cmsghdr *cmh) +{ + struct in6_pktinfo *pki = CMSG_DATA(cmh); + if (cmh->cmsg_type != IPV6_PKTINFO) + return 0; + ipv6_addr_copy(&rqstp->rq_daddr.addr6, &pki->ipi6_addr); + return 1; +} + +/* * Copy the UDP datagram's destination address to the rqstp structure. * The 'destination' address in this case is the address to which the * peer sent the datagram, i.e. our local address. For multihomed * hosts, this can change from msg to msg. Note that only the IP * address changes, the port number should remain the same. */ -static void svc_udp_get_dest_address(struct svc_rqst *rqstp, - struct cmsghdr *cmh) +static int svc_udp_get_dest_address(struct svc_rqst *rqstp, + struct cmsghdr *cmh) { - struct svc_sock *svsk = - container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); - switch (svsk->sk_sk->sk_family) { - case AF_INET: { - struct in_pktinfo *pki = CMSG_DATA(cmh); - rqstp->rq_daddr.addr.s_addr = pki->ipi_spec_dst.s_addr; - break; - } - case AF_INET6: { - struct in6_pktinfo *pki = CMSG_DATA(cmh); - ipv6_addr_copy(&rqstp->rq_daddr.addr6, &pki->ipi6_addr); - break; - } + switch (cmh->cmsg_level) { + case SOL_IP: + return svc_udp_get_dest_address4(rqstp, cmh); + case SOL_IPV6: + return svc_udp_get_dest_address6(rqstp, cmh); } + + return 0; } /* @@ -531,16 +572,15 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) rqstp->rq_prot = IPPROTO_UDP; - if (cmh->cmsg_level != IPPROTO_IP || - cmh->cmsg_type != IP_PKTINFO) { + if (!svc_udp_get_dest_address(rqstp, cmh)) { if (net_ratelimit()) - printk("rpcsvc: received unknown control message:" - "%d/%d\n", - cmh->cmsg_level, cmh->cmsg_type); + printk(KERN_WARNING + "svc: received unknown control message %d/%d; " + "dropping RPC reply datagram\n", + cmh->cmsg_level, cmh->cmsg_type); skb_free_datagram(svsk->sk_sk, skb); return 0; } - svc_udp_get_dest_address(rqstp, cmh); if (skb_is_nonlinear(skb)) { /* we have to copy */ @@ -651,8 +691,7 @@ static struct svc_xprt_class svc_udp_class = { static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv) { - int one = 1; - mm_segment_t oldfs; + int err, level, optname, one = 1; svc_xprt_init(&svc_udp_class, &svsk->sk_xprt, serv); clear_bit(XPT_CACHE_AUTH, &svsk->sk_xprt.xpt_flags); @@ -671,12 +710,22 @@ static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv) set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); set_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags); - oldfs = get_fs(); - set_fs(KERNEL_DS); /* make sure we get destination address info */ - svsk->sk_sock->ops->setsockopt(svsk->sk_sock, IPPROTO_IP, IP_PKTINFO, - (char __user *)&one, sizeof(one)); - set_fs(oldfs); + switch (svsk->sk_sk->sk_family) { + case AF_INET: + level = SOL_IP; + optname = IP_PKTINFO; + break; + case AF_INET6: + level = SOL_IPV6; + optname = IPV6_RECVPKTINFO; + break; + default: + BUG(); + } + err = kernel_setsockopt(svsk->sk_sock, level, optname, + (char *)&one, sizeof(one)); + dprintk("svc: kernel_setsockopt returned %d\n", err); } /* @@ -826,21 +875,15 @@ failed: } /* - * Receive data from a TCP socket. + * Receive data. + * If we haven't gotten the record length yet, get the next four bytes. + * Otherwise try to gobble up as much as possible up to the complete + * record length. */ -static int svc_tcp_recvfrom(struct svc_rqst *rqstp) +static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp) { - struct svc_sock *svsk = - container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); struct svc_serv *serv = svsk->sk_xprt.xpt_server; - int len; - struct kvec *vec; - int pnum, vlen; - - dprintk("svc: tcp_recv %p data %d conn %d close %d\n", - svsk, test_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags), - test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags), - test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags)); + int len; if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags)) /* sndbuf needs to have room for one request @@ -861,10 +904,6 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); - /* Receive data. If we haven't got the record length yet, get - * the next four bytes. Otherwise try to gobble up as much as - * possible up to the complete record length. - */ if (svsk->sk_tcplen < sizeof(rpc_fraghdr)) { int want = sizeof(rpc_fraghdr) - svsk->sk_tcplen; struct kvec iov; @@ -879,7 +918,7 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) dprintk("svc: short recvfrom while reading record " "length (%d of %d)\n", len, want); svc_xprt_received(&svsk->sk_xprt); - return -EAGAIN; /* record header not complete */ + goto err_again; /* record header not complete */ } svsk->sk_reclen = ntohl(svsk->sk_reclen); @@ -894,6 +933,7 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) "per record not supported\n"); goto err_delete; } + svsk->sk_reclen &= RPC_FRAGMENT_SIZE_MASK; dprintk("svc: TCP record, %d bytes\n", svsk->sk_reclen); if (svsk->sk_reclen > serv->sv_max_mesg) { @@ -914,17 +954,121 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) dprintk("svc: incomplete TCP record (%d of %d)\n", len, svsk->sk_reclen); svc_xprt_received(&svsk->sk_xprt); - return -EAGAIN; /* record not complete */ + goto err_again; /* record not complete */ } len = svsk->sk_reclen; set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); + return len; + error: + if (len == -EAGAIN) { + dprintk("RPC: TCP recv_record got EAGAIN\n"); + svc_xprt_received(&svsk->sk_xprt); + } + return len; + err_delete: + set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); + err_again: + return -EAGAIN; +} + +static int svc_process_calldir(struct svc_sock *svsk, struct svc_rqst *rqstp, + struct rpc_rqst **reqpp, struct kvec *vec) +{ + struct rpc_rqst *req = NULL; + u32 *p; + u32 xid; + u32 calldir; + int len; + + len = svc_recvfrom(rqstp, vec, 1, 8); + if (len < 0) + goto error; + + p = (u32 *)rqstp->rq_arg.head[0].iov_base; + xid = *p++; + calldir = *p; + + if (calldir == 0) { + /* REQUEST is the most common case */ + vec[0] = rqstp->rq_arg.head[0]; + } else { + /* REPLY */ + if (svsk->sk_bc_xprt) + req = xprt_lookup_rqst(svsk->sk_bc_xprt, xid); + + if (!req) { + printk(KERN_NOTICE + "%s: Got unrecognized reply: " + "calldir 0x%x sk_bc_xprt %p xid %08x\n", + __func__, ntohl(calldir), + svsk->sk_bc_xprt, xid); + vec[0] = rqstp->rq_arg.head[0]; + goto out; + } + + memcpy(&req->rq_private_buf, &req->rq_rcv_buf, + sizeof(struct xdr_buf)); + /* copy the xid and call direction */ + memcpy(req->rq_private_buf.head[0].iov_base, + rqstp->rq_arg.head[0].iov_base, 8); + vec[0] = req->rq_private_buf.head[0]; + } + out: + vec[0].iov_base += 8; + vec[0].iov_len -= 8; + len = svsk->sk_reclen - 8; + error: + *reqpp = req; + return len; +} + +/* + * Receive data from a TCP socket. + */ +static int svc_tcp_recvfrom(struct svc_rqst *rqstp) +{ + struct svc_sock *svsk = + container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); + struct svc_serv *serv = svsk->sk_xprt.xpt_server; + int len; + struct kvec *vec; + int pnum, vlen; + struct rpc_rqst *req = NULL; + + dprintk("svc: tcp_recv %p data %d conn %d close %d\n", + svsk, test_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags), + test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags), + test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags)); + + len = svc_tcp_recv_record(svsk, rqstp); + if (len < 0) + goto error; + vec = rqstp->rq_vec; vec[0] = rqstp->rq_arg.head[0]; vlen = PAGE_SIZE; + + /* + * We have enough data for the whole tcp record. Let's try and read the + * first 8 bytes to get the xid and the call direction. We can use this + * to figure out if this is a call or a reply to a callback. If + * sk_reclen is < 8 (xid and calldir), then this is a malformed packet. + * In that case, don't bother with the calldir and just read the data. + * It will be rejected in svc_process. + */ + if (len >= 8) { + len = svc_process_calldir(svsk, rqstp, &req, vec); + if (len < 0) + goto err_again; + vlen -= 8; + } + pnum = 1; while (vlen < len) { - vec[pnum].iov_base = page_address(rqstp->rq_pages[pnum]); + vec[pnum].iov_base = (req) ? + page_address(req->rq_private_buf.pages[pnum - 1]) : + page_address(rqstp->rq_pages[pnum]); vec[pnum].iov_len = PAGE_SIZE; pnum++; vlen += PAGE_SIZE; @@ -934,8 +1078,18 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) /* Now receive data */ len = svc_recvfrom(rqstp, vec, pnum, len); if (len < 0) - goto error; + goto err_again; + /* + * Account for the 8 bytes we read earlier + */ + len += 8; + + if (req) { + xprt_complete_rqst(req->rq_task, len); + len = 0; + goto out; + } dprintk("svc: TCP complete record (%d bytes)\n", len); rqstp->rq_arg.len = len; rqstp->rq_arg.page_base = 0; @@ -949,6 +1103,7 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) rqstp->rq_xprt_ctxt = NULL; rqstp->rq_prot = IPPROTO_TCP; +out: /* Reset TCP read info */ svsk->sk_reclen = 0; svsk->sk_tcplen = 0; @@ -960,21 +1115,19 @@ static int svc_tcp_recvfrom(struct svc_rqst *rqstp) return len; - err_delete: - set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); - return -EAGAIN; - - error: +err_again: if (len == -EAGAIN) { dprintk("RPC: TCP recvfrom got EAGAIN\n"); svc_xprt_received(&svsk->sk_xprt); - } else { + return len; + } +error: + if (len != -EAGAIN) { printk(KERN_NOTICE "%s: recvfrom returned errno %d\n", svsk->sk_xprt.xpt_server->sv_name, -len); - goto err_delete; + set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); } - - return len; + return -EAGAIN; } /* diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index f412a852bc73d..fd46d42afa89e 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -832,6 +832,11 @@ static void xprt_timer(struct rpc_task *task) spin_unlock_bh(&xprt->transport_lock); } +static inline int xprt_has_timer(struct rpc_xprt *xprt) +{ + return xprt->idle_timeout != 0; +} + /** * xprt_prepare_transmit - reserve the transport before sending a request * @task: RPC task about to send a request @@ -1013,7 +1018,7 @@ void xprt_release(struct rpc_task *task) if (!list_empty(&req->rq_list)) list_del(&req->rq_list); xprt->last_used = jiffies; - if (list_empty(&xprt->recv)) + if (list_empty(&xprt->recv) && xprt_has_timer(xprt)) mod_timer(&xprt->timer, xprt->last_used + xprt->idle_timeout); spin_unlock_bh(&xprt->transport_lock); @@ -1082,8 +1087,11 @@ found: #endif /* CONFIG_NFS_V4_1 */ INIT_WORK(&xprt->task_cleanup, xprt_autoclose); - setup_timer(&xprt->timer, xprt_init_autodisconnect, - (unsigned long)xprt); + if (xprt_has_timer(xprt)) + setup_timer(&xprt->timer, xprt_init_autodisconnect, + (unsigned long)xprt); + else + init_timer(&xprt->timer); xprt->last_used = jiffies; xprt->cwnd = RPC_INITCWND; xprt->bind_index = 0; @@ -1102,7 +1110,6 @@ found: dprintk("RPC: created transport %p with %u slots\n", xprt, xprt->max_reqs); - return xprt; } diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index 5151f9f6c5731..0cf5e8c27a105 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -730,12 +730,12 @@ static struct svc_rdma_fastreg_mr *rdma_alloc_frmr(struct svcxprt_rdma *xprt) goto err; mr = ib_alloc_fast_reg_mr(xprt->sc_pd, RPCSVC_MAXPAGES); - if (!mr) + if (IS_ERR(mr)) goto err_free_frmr; pl = ib_alloc_fast_reg_page_list(xprt->sc_cm_id->device, RPCSVC_MAXPAGES); - if (!pl) + if (IS_ERR(pl)) goto err_free_mr; frmr->mr = mr; diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 62438f3a914d6..bee4154657547 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -32,6 +32,7 @@ #include <linux/tcp.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/sched.h> +#include <linux/sunrpc/svcsock.h> #include <linux/sunrpc/xprtsock.h> #include <linux/file.h> #ifdef CONFIG_NFS_V4_1 @@ -43,6 +44,7 @@ #include <net/udp.h> #include <net/tcp.h> +#include "sunrpc.h" /* * xprtsock tunables */ @@ -2098,6 +2100,134 @@ static void xs_tcp_print_stats(struct rpc_xprt *xprt, struct seq_file *seq) xprt->stat.bklog_u); } +/* + * Allocate a bunch of pages for a scratch buffer for the rpc code. The reason + * we allocate pages instead doing a kmalloc like rpc_malloc is because we want + * to use the server side send routines. + */ +void *bc_malloc(struct rpc_task *task, size_t size) +{ + struct page *page; + struct rpc_buffer *buf; + + BUG_ON(size > PAGE_SIZE - sizeof(struct rpc_buffer)); + page = alloc_page(GFP_KERNEL); + + if (!page) + return NULL; + + buf = page_address(page); + buf->len = PAGE_SIZE; + + return buf->data; +} + +/* + * Free the space allocated in the bc_alloc routine + */ +void bc_free(void *buffer) +{ + struct rpc_buffer *buf; + + if (!buffer) + return; + + buf = container_of(buffer, struct rpc_buffer, data); + free_page((unsigned long)buf); +} + +/* + * Use the svc_sock to send the callback. Must be called with svsk->sk_mutex + * held. Borrows heavily from svc_tcp_sendto and xs_tcp_send_request. + */ +static int bc_sendto(struct rpc_rqst *req) +{ + int len; + struct xdr_buf *xbufp = &req->rq_snd_buf; + struct rpc_xprt *xprt = req->rq_xprt; + struct sock_xprt *transport = + container_of(xprt, struct sock_xprt, xprt); + struct socket *sock = transport->sock; + unsigned long headoff; + unsigned long tailoff; + + /* + * Set up the rpc header and record marker stuff + */ + xs_encode_tcp_record_marker(xbufp); + + tailoff = (unsigned long)xbufp->tail[0].iov_base & ~PAGE_MASK; + headoff = (unsigned long)xbufp->head[0].iov_base & ~PAGE_MASK; + len = svc_send_common(sock, xbufp, + virt_to_page(xbufp->head[0].iov_base), headoff, + xbufp->tail[0].iov_base, tailoff); + + if (len != xbufp->len) { + printk(KERN_NOTICE "Error sending entire callback!\n"); + len = -EAGAIN; + } + + return len; +} + +/* + * The send routine. Borrows from svc_send + */ +static int bc_send_request(struct rpc_task *task) +{ + struct rpc_rqst *req = task->tk_rqstp; + struct svc_xprt *xprt; + struct svc_sock *svsk; + u32 len; + + dprintk("sending request with xid: %08x\n", ntohl(req->rq_xid)); + /* + * Get the server socket associated with this callback xprt + */ + xprt = req->rq_xprt->bc_xprt; + svsk = container_of(xprt, struct svc_sock, sk_xprt); + + /* + * Grab the mutex to serialize data as the connection is shared + * with the fore channel + */ + if (!mutex_trylock(&xprt->xpt_mutex)) { + rpc_sleep_on(&xprt->xpt_bc_pending, task, NULL); + if (!mutex_trylock(&xprt->xpt_mutex)) + return -EAGAIN; + rpc_wake_up_queued_task(&xprt->xpt_bc_pending, task); + } + if (test_bit(XPT_DEAD, &xprt->xpt_flags)) + len = -ENOTCONN; + else + len = bc_sendto(req); + mutex_unlock(&xprt->xpt_mutex); + + if (len > 0) + len = 0; + + return len; +} + +/* + * The close routine. Since this is client initiated, we do nothing + */ + +static void bc_close(struct rpc_xprt *xprt) +{ + return; +} + +/* + * The xprt destroy routine. Again, because this connection is client + * initiated, we do nothing + */ + +static void bc_destroy(struct rpc_xprt *xprt) +{ + return; +} + static struct rpc_xprt_ops xs_udp_ops = { .set_buffer_size = xs_udp_set_buffer_size, .reserve_xprt = xprt_reserve_xprt_cong, @@ -2134,6 +2264,22 @@ static struct rpc_xprt_ops xs_tcp_ops = { .print_stats = xs_tcp_print_stats, }; +/* + * The rpc_xprt_ops for the server backchannel + */ + +static struct rpc_xprt_ops bc_tcp_ops = { + .reserve_xprt = xprt_reserve_xprt, + .release_xprt = xprt_release_xprt, + .buf_alloc = bc_malloc, + .buf_free = bc_free, + .send_request = bc_send_request, + .set_retrans_timeout = xprt_set_retrans_timeout_def, + .close = bc_close, + .destroy = bc_destroy, + .print_stats = xs_tcp_print_stats, +}; + static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args, unsigned int slot_table_size) { @@ -2322,11 +2468,93 @@ static struct rpc_xprt *xs_setup_tcp(struct xprt_create *args) return ERR_PTR(-EINVAL); } +/** + * xs_setup_bc_tcp - Set up transport to use a TCP backchannel socket + * @args: rpc transport creation arguments + * + */ +static struct rpc_xprt *xs_setup_bc_tcp(struct xprt_create *args) +{ + struct sockaddr *addr = args->dstaddr; + struct rpc_xprt *xprt; + struct sock_xprt *transport; + struct svc_sock *bc_sock; + + if (!args->bc_xprt) + ERR_PTR(-EINVAL); + + xprt = xs_setup_xprt(args, xprt_tcp_slot_table_entries); + if (IS_ERR(xprt)) + return xprt; + transport = container_of(xprt, struct sock_xprt, xprt); + + xprt->prot = IPPROTO_TCP; + xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32); + xprt->max_payload = RPC_MAX_FRAGMENT_SIZE; + xprt->timeout = &xs_tcp_default_timeout; + + /* backchannel */ + xprt_set_bound(xprt); + xprt->bind_timeout = 0; + xprt->connect_timeout = 0; + xprt->reestablish_timeout = 0; + xprt->idle_timeout = 0; + + /* + * The backchannel uses the same socket connection as the + * forechannel + */ + xprt->bc_xprt = args->bc_xprt; + bc_sock = container_of(args->bc_xprt, struct svc_sock, sk_xprt); + bc_sock->sk_bc_xprt = xprt; + transport->sock = bc_sock->sk_sock; + transport->inet = bc_sock->sk_sk; + + xprt->ops = &bc_tcp_ops; + + switch (addr->sa_family) { + case AF_INET: + xs_format_peer_addresses(xprt, "tcp", + RPCBIND_NETID_TCP); + break; + case AF_INET6: + xs_format_peer_addresses(xprt, "tcp", + RPCBIND_NETID_TCP6); + break; + default: + kfree(xprt); + return ERR_PTR(-EAFNOSUPPORT); + } + + if (xprt_bound(xprt)) + dprintk("RPC: set up xprt to %s (port %s) via %s\n", + xprt->address_strings[RPC_DISPLAY_ADDR], + xprt->address_strings[RPC_DISPLAY_PORT], + xprt->address_strings[RPC_DISPLAY_PROTO]); + else + dprintk("RPC: set up xprt to %s (autobind) via %s\n", + xprt->address_strings[RPC_DISPLAY_ADDR], + xprt->address_strings[RPC_DISPLAY_PROTO]); + + /* + * Since we don't want connections for the backchannel, we set + * the xprt status to connected + */ + xprt_set_connected(xprt); + + + if (try_module_get(THIS_MODULE)) + return xprt; + kfree(xprt->slot); + kfree(xprt); + return ERR_PTR(-EINVAL); +} + static struct xprt_class xs_udp_transport = { .list = LIST_HEAD_INIT(xs_udp_transport.list), .name = "udp", .owner = THIS_MODULE, - .ident = IPPROTO_UDP, + .ident = XPRT_TRANSPORT_UDP, .setup = xs_setup_udp, }; @@ -2334,10 +2562,18 @@ static struct xprt_class xs_tcp_transport = { .list = LIST_HEAD_INIT(xs_tcp_transport.list), .name = "tcp", .owner = THIS_MODULE, - .ident = IPPROTO_TCP, + .ident = XPRT_TRANSPORT_TCP, .setup = xs_setup_tcp, }; +static struct xprt_class xs_bc_tcp_transport = { + .list = LIST_HEAD_INIT(xs_bc_tcp_transport.list), + .name = "tcp NFSv4.1 backchannel", + .owner = THIS_MODULE, + .ident = XPRT_TRANSPORT_BC_TCP, + .setup = xs_setup_bc_tcp, +}; + /** * init_socket_xprt - set up xprtsock's sysctls, register with RPC client * @@ -2351,6 +2587,7 @@ int init_socket_xprt(void) xprt_register_transport(&xs_udp_transport); xprt_register_transport(&xs_tcp_transport); + xprt_register_transport(&xs_bc_tcp_transport); return 0; } @@ -2370,6 +2607,7 @@ void cleanup_socket_xprt(void) xprt_unregister_transport(&xs_udp_transport); xprt_unregister_transport(&xs_tcp_transport); + xprt_unregister_transport(&xs_bc_tcp_transport); } static int param_set_uint_minmax(const char *val, struct kernel_param *kp, |