diff options
author | rmacklem <rmacklem@FreeBSD.org> | 2009-05-04 15:23:58 +0000 |
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committer | rmacklem <rmacklem@FreeBSD.org> | 2009-05-04 15:23:58 +0000 |
commit | e3d34903b6fb9cb09f7e616bde59d97341958fa2 (patch) | |
tree | 0246ff14527b554e60f1c9212be00ee8c1128197 /sys/fs/nfs/nfs_commonkrpc.c | |
parent | fb2908c8ff440e0985013b83071bd8dfecb11371 (diff) | |
download | FreeBSD-src-e3d34903b6fb9cb09f7e616bde59d97341958fa2.zip FreeBSD-src-e3d34903b6fb9cb09f7e616bde59d97341958fa2.tar.gz |
Add the experimental nfs subtree to the kernel, that includes
support for NFSv4 as well as NFSv2 and 3.
It lives in 3 subdirs under sys/fs:
nfs - functions that are common to the client and server
nfsclient - a mutation of sys/nfsclient that call generic functions
to do RPCs and handle state. As such, it retains the
buffer cache handling characteristics and vnode semantics that
are found in sys/nfsclient, for the most part.
nfsserver - the server. It includes a DRC designed specifically for
NFSv4, that is used instead of the generic DRC in sys/rpc.
The build glue will be checked in later, so at this point, it
consists of 3 new subdirs that should not affect kernel building.
Approved by: kib (mentor)
Diffstat (limited to 'sys/fs/nfs/nfs_commonkrpc.c')
-rw-r--r-- | sys/fs/nfs/nfs_commonkrpc.c | 901 |
1 files changed, 901 insertions, 0 deletions
diff --git a/sys/fs/nfs/nfs_commonkrpc.c b/sys/fs/nfs/nfs_commonkrpc.c new file mode 100644 index 0000000..429eed2 --- /dev/null +++ b/sys/fs/nfs/nfs_commonkrpc.c @@ -0,0 +1,901 @@ +/*- + * Copyright (c) 1989, 1991, 1993, 1995 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Rick Macklem at The University of Guelph. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * Socket operations for use by nfs + */ + +#include "opt_inet6.h" +#include "opt_kgssapi.h" +#include "opt_nfs.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/limits.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/mount.h> +#include <sys/mutex.h> +#include <sys/proc.h> +#include <sys/signalvar.h> +#include <sys/syscallsubr.h> +#include <sys/sysctl.h> +#include <sys/syslog.h> +#include <sys/vnode.h> + +#include <rpc/rpc.h> +#include <rpc/rpcclnt.h> + +#include <kgssapi/krb5/kcrypto.h> + +#include <fs/nfs/nfsport.h> + +NFSSTATESPINLOCK; +NFSREQSPINLOCK; +extern struct nfsstats newnfsstats; +extern struct nfsreqhead nfsd_reqq; +extern int nfscl_ticks; +extern void (*ncl_call_invalcaches)(struct vnode *); + +static int nfsrv_gsscallbackson = 0; +static int nfs_bufpackets = 4; +static int nfs_reconnects; +static int nfs3_jukebox_delay = 10; +static int nfs_skip_wcc_data_onerr = 1; +static int nfs_keytab_enctype = ETYPE_DES_CBC_CRC; + +SYSCTL_DECL(_vfs_newnfs); + +SYSCTL_INT(_vfs_newnfs, OID_AUTO, bufpackets, CTLFLAG_RW, &nfs_bufpackets, 0, + "Buffer reservation size 2 < x < 64"); +SYSCTL_INT(_vfs_newnfs, OID_AUTO, reconnects, CTLFLAG_RD, &nfs_reconnects, 0, + "Number of times the nfs client has had to reconnect"); +SYSCTL_INT(_vfs_newnfs, OID_AUTO, nfs3_jukebox_delay, CTLFLAG_RW, &nfs3_jukebox_delay, 0, + "Number of seconds to delay a retry after receiving EJUKEBOX"); +SYSCTL_INT(_vfs_newnfs, OID_AUTO, skip_wcc_data_onerr, CTLFLAG_RW, &nfs_skip_wcc_data_onerr, 0, + "Disable weak cache consistency checking when server returns an error"); +SYSCTL_INT(_vfs_newnfs, OID_AUTO, keytab_enctype, CTLFLAG_RW, &nfs_keytab_enctype, 0, + "Encryption type for the keytab entry used by nfs"); + +static void nfs_down(struct nfsmount *, struct thread *, const char *, + int, int); +static void nfs_up(struct nfsmount *, struct thread *, const char *, + int, int); +static int nfs_msg(struct thread *, const char *, const char *, int); + +extern int nfsv2_procid[]; + +struct nfs_cached_auth { + int ca_refs; /* refcount, including 1 from the cache */ + uid_t ca_uid; /* uid that corresponds to this auth */ + AUTH *ca_auth; /* RPC auth handle */ +}; + +/* + * Initialize sockets and congestion for a new NFS connection. + * We do not free the sockaddr if error. + */ +int +newnfs_connect(struct nfsmount *nmp, struct nfssockreq *nrp, + struct ucred *cred, NFSPROC_T *p, int callback_retry_mult) +{ + int rcvreserve, sndreserve; + int pktscale; + struct sockaddr *saddr; + struct ucred *origcred; + CLIENT *client; + struct netconfig *nconf; + struct socket *so; + int one = 1, retries, error, printsbmax = 0; + struct thread *td = curthread; + + /* + * We need to establish the socket using the credentials of + * the mountpoint. Some parts of this process (such as + * sobind() and soconnect()) will use the curent thread's + * credential instead of the socket credential. To work + * around this, temporarily change the current thread's + * credential to that of the mountpoint. + * + * XXX: It would be better to explicitly pass the correct + * credential to sobind() and soconnect(). + */ + origcred = td->td_ucred; + + /* + * Use the credential in nr_cred, if not NULL. + */ + if (nrp->nr_cred != NULL) + td->td_ucred = nrp->nr_cred; + else + td->td_ucred = cred; + saddr = nrp->nr_nam; + + if (saddr->sa_family == AF_INET) + if (nrp->nr_sotype == SOCK_DGRAM) + nconf = getnetconfigent("udp"); + else + nconf = getnetconfigent("tcp"); + else + if (nrp->nr_sotype == SOCK_DGRAM) + nconf = getnetconfigent("udp6"); + else + nconf = getnetconfigent("tcp6"); + + pktscale = nfs_bufpackets; + if (pktscale < 2) + pktscale = 2; + if (pktscale > 64) + pktscale = 64; + /* + * soreserve() can fail if sb_max is too small, so shrink pktscale + * and try again if there is an error. + * Print a log message suggesting increasing sb_max. + * Creating a socket and doing this is necessary since, if the + * reservation sizes are too large and will make soreserve() fail, + * the connection will work until a large send is attempted and + * then it will loop in the krpc code. + */ + so = NULL; + saddr = NFSSOCKADDR(nrp->nr_nam, struct sockaddr *); + error = socreate(saddr->sa_family, &so, nrp->nr_sotype, + nrp->nr_soproto, td->td_ucred, td); + if (error) { + td->td_ucred = origcred; + return (error); + } + do { + if (error != 0 && pktscale > 2) { + pktscale--; + if (printsbmax == 0) { + printf("nfscl: consider increasing kern.ipc.maxsockbuf\n"); + printsbmax = 1; + } + } + if (nrp->nr_sotype == SOCK_DGRAM) { + if (nmp != NULL) { + sndreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * + pktscale; + rcvreserve = (NFS_MAXDGRAMDATA + NFS_MAXPKTHDR) * + pktscale; + } else { + sndreserve = rcvreserve = 1024 * pktscale; + } + } else { + if (nrp->nr_sotype != SOCK_STREAM) + panic("nfscon sotype"); + if (nmp != NULL) { + sndreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR + + sizeof (u_int32_t)) * pktscale; + rcvreserve = (NFS_MAXBSIZE + NFS_MAXPKTHDR + + sizeof (u_int32_t)) * pktscale; + } else { + sndreserve = rcvreserve = 1024 * pktscale; + } + } + error = soreserve(so, sndreserve, rcvreserve); + } while (error != 0 && pktscale > 2); + soclose(so); + if (error) { + td->td_ucred = origcred; + return (error); + } + + client = clnt_reconnect_create(nconf, saddr, nrp->nr_prog, + nrp->nr_vers, sndreserve, rcvreserve); + CLNT_CONTROL(client, CLSET_WAITCHAN, "newnfsreq"); + if (nmp != NULL) { + if ((nmp->nm_flag & NFSMNT_INT)) + CLNT_CONTROL(client, CLSET_INTERRUPTIBLE, &one); + if ((nmp->nm_flag & NFSMNT_RESVPORT)) + CLNT_CONTROL(client, CLSET_PRIVPORT, &one); + if (NFSHASSOFT(nmp)) + retries = nmp->nm_retry; + else + retries = INT_MAX; + } else { + /* + * Three cases: + * - Null RPC callback to client + * - Non-Null RPC callback to client, wait a little longer + * - upcalls to nfsuserd and gssd (clp == NULL) + */ + if (callback_retry_mult == 0) { + retries = NFSV4_UPCALLRETRY; + CLNT_CONTROL(client, CLSET_PRIVPORT, &one); + } else { + retries = NFSV4_CALLBACKRETRY * callback_retry_mult; + } + } + CLNT_CONTROL(client, CLSET_RETRIES, &retries); + + mtx_lock(&nrp->nr_mtx); + if (nrp->nr_client != NULL) { + /* + * Someone else already connected. + */ + CLNT_RELEASE(client); + } else { + nrp->nr_client = client; + } + + /* + * Protocols that do not require connections may be optionally left + * unconnected for servers that reply from a port other than NFS_PORT. + */ + if (nmp == NULL || (nmp->nm_flag & NFSMNT_NOCONN) == 0) { + mtx_unlock(&nrp->nr_mtx); + CLNT_CONTROL(client, CLSET_CONNECT, &one); + } else { + mtx_unlock(&nrp->nr_mtx); + } + + /* Restore current thread's credentials. */ + td->td_ucred = origcred; + return (0); +} + +/* + * NFS disconnect. Clean up and unlink. + */ +void +newnfs_disconnect(struct nfssockreq *nrp) +{ + CLIENT *client; + + mtx_lock(&nrp->nr_mtx); + if (nrp->nr_client != NULL) { + client = nrp->nr_client; + nrp->nr_client = NULL; + mtx_unlock(&nrp->nr_mtx); +#ifdef KGSSAPI + rpc_gss_secpurge(client); +#endif + CLNT_CLOSE(client); + CLNT_RELEASE(client); + } else { + mtx_unlock(&nrp->nr_mtx); + } +} + +static AUTH * +nfs_getauth(struct nfssockreq *nrp, int secflavour, char *clnt_principal, + char *srv_principal, gss_OID mech_oid, struct ucred *cred) +{ +#ifdef KGSSAPI + rpc_gss_service_t svc; + AUTH *auth; + rpc_gss_options_req_t req_options; +#endif + + switch (secflavour) { +#ifdef KGSSAPI + case RPCSEC_GSS_KRB5: + case RPCSEC_GSS_KRB5I: + case RPCSEC_GSS_KRB5P: + if (!mech_oid) { + if (!rpc_gss_mech_to_oid("kerberosv5", &mech_oid)) + return (NULL); + } + if (secflavour == RPCSEC_GSS_KRB5) + svc = rpc_gss_svc_none; + else if (secflavour == RPCSEC_GSS_KRB5I) + svc = rpc_gss_svc_integrity; + else + svc = rpc_gss_svc_privacy; + req_options.req_flags = GSS_C_MUTUAL_FLAG; + req_options.time_req = 0; + req_options.my_cred = GSS_C_NO_CREDENTIAL; + req_options.input_channel_bindings = NULL; + req_options.enc_type = nfs_keytab_enctype; + + auth = rpc_gss_secfind(nrp->nr_client, cred, + clnt_principal, srv_principal, mech_oid, svc, + &req_options); + return (auth); +#endif + case AUTH_SYS: + default: + return (authunix_create(cred)); + + } +} + +/* + * Callback from the RPC code to generate up/down notifications. + */ + +struct nfs_feedback_arg { + struct nfsmount *nf_mount; + int nf_lastmsg; /* last tprintf */ + int nf_tprintfmsg; + struct thread *nf_td; +}; + +static void +nfs_feedback(int type, int proc, void *arg) +{ + struct nfs_feedback_arg *nf = (struct nfs_feedback_arg *) arg; + struct nfsmount *nmp = nf->nf_mount; + struct timeval now; + + getmicrouptime(&now); + + switch (type) { + case FEEDBACK_REXMIT2: + case FEEDBACK_RECONNECT: + if (nf->nf_lastmsg + nmp->nm_tprintf_delay < now.tv_sec) { + nfs_down(nmp, nf->nf_td, + "not responding", 0, NFSSTA_TIMEO); + nf->nf_tprintfmsg = TRUE; + nf->nf_lastmsg = now.tv_sec; + } + break; + + case FEEDBACK_OK: + nfs_up(nf->nf_mount, nf->nf_td, + "is alive again", NFSSTA_TIMEO, nf->nf_tprintfmsg); + break; + } +} + +/* + * newnfs_request - goes something like this + * - does the rpc by calling the krpc layer + * - break down rpc header and return with nfs reply + * nb: always frees up nd_mreq mbuf list + */ +int +newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp, + struct nfsclient *clp, struct nfssockreq *nrp, vnode_t vp, + struct thread *td, struct ucred *cred, u_int32_t prog, u_int32_t vers, + u_char *retsum, int toplevel, u_int64_t *xidp) +{ + u_int32_t *tl; + time_t waituntil; + int i, j; + int trycnt, error = 0, usegssname = 0, secflavour = AUTH_SYS; + u_int16_t procnum; + u_int trylater_delay = 1; + struct nfs_feedback_arg nf; + struct timeval timo, now; + AUTH *auth; + struct rpc_callextra ext; + enum clnt_stat stat; + struct nfsreq *rep = NULL; + char *srv_principal = NULL; + + if (xidp != NULL) + *xidp = 0; + /* Reject requests while attempting a forced unmount. */ + if (nmp != NULL && (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF)) { + m_freem(nd->nd_mreq); + return (ESTALE); + } + + /* + * For a client side mount, nmp is != NULL and clp == NULL. For + * server calls (callbacks or upcalls), nmp == NULL. + */ + if (clp != NULL) { + NFSLOCKSTATE(); + if ((clp->lc_flags & LCL_GSS) && nfsrv_gsscallbackson) { + secflavour = RPCSEC_GSS_KRB5; + if (nd->nd_procnum != NFSPROC_NULL) { + if (clp->lc_flags & LCL_GSSINTEGRITY) + secflavour = RPCSEC_GSS_KRB5I; + else if (clp->lc_flags & LCL_GSSPRIVACY) + secflavour = RPCSEC_GSS_KRB5P; + } + } + NFSUNLOCKSTATE(); + } else if (nmp != NULL && NFSHASKERB(nmp) && + nd->nd_procnum != NFSPROC_NULL) { + if (NFSHASALLGSSNAME(nmp) && nmp->nm_krbnamelen > 0) + nd->nd_flag |= ND_USEGSSNAME; + if ((nd->nd_flag & ND_USEGSSNAME) && nmp->nm_krbnamelen > 0) + usegssname = 1; + if (NFSHASINTEGRITY(nmp)) + secflavour = RPCSEC_GSS_KRB5I; + else if (NFSHASPRIVACY(nmp)) + secflavour = RPCSEC_GSS_KRB5P; + else + secflavour = RPCSEC_GSS_KRB5; + srv_principal = NFSMNT_SRVKRBNAME(nmp); + } + + if (nmp != NULL) { + bzero(&nf, sizeof(struct nfs_feedback_arg)); + nf.nf_mount = nmp; + nf.nf_td = td; + getmicrouptime(&now); + nf.nf_lastmsg = now.tv_sec - + ((nmp->nm_tprintf_delay)-(nmp->nm_tprintf_initial_delay)); + } + + /* + * XXX if not already connected call nfs_connect now. Longer + * term, change nfs_mount to call nfs_connect unconditionally + * and let clnt_reconnect_create handle reconnects. + */ + if (nrp->nr_client == NULL) + newnfs_connect(nmp, nrp, cred, td, 0); + + if (usegssname) + auth = nfs_getauth(nrp, secflavour, nmp->nm_krbname, + srv_principal, NULL, cred); + else + auth = nfs_getauth(nrp, secflavour, NULL, + srv_principal, NULL, cred); + if (auth == NULL) { + m_freem(nd->nd_mreq); + return (EACCES); + } + bzero(&ext, sizeof(ext)); + ext.rc_auth = auth; + if (nmp != NULL) { + ext.rc_feedback = nfs_feedback; + ext.rc_feedback_arg = &nf; + } + + procnum = nd->nd_procnum; + if ((nd->nd_flag & ND_NFSV4) && + nd->nd_procnum != NFSV4PROC_CBNULL && + nd->nd_procnum != NFSV4PROC_CBCOMPOUND) + procnum = NFSV4PROC_COMPOUND; + + if (nmp != NULL) { + NFSINCRGLOBAL(newnfsstats.rpcrequests); + /* + * Now only used for the R_DONTRECOVER case, but until that is + * supported within the krpc code, I need to keep a queue of + * outstanding RPCs for nfsv4 client requests. + */ + if ((nd->nd_flag & ND_NFSV4) && procnum == NFSV4PROC_COMPOUND) + MALLOC(rep, struct nfsreq *, sizeof(struct nfsreq), + M_NFSDREQ, M_WAITOK); + } + trycnt = 0; +tryagain: + if (nmp == NULL) { + timo.tv_usec = 0; + if (clp == NULL) + timo.tv_sec = NFSV4_UPCALLTIMEO; + else + timo.tv_sec = NFSV4_CALLBACKTIMEO; + } else { + if (nrp->nr_sotype != SOCK_DGRAM) { + timo.tv_usec = 0; + if ((nmp->nm_flag & NFSMNT_NFSV4)) + timo.tv_sec = INT_MAX; + else + timo.tv_sec = NFS_TCPTIMEO; + } else { + timo.tv_sec = nmp->nm_timeo / NFS_HZ; + timo.tv_usec = (nmp->nm_timeo * 1000000) / NFS_HZ; + } + + if (rep != NULL) { + rep->r_flags = 0; + rep->r_nmp = nmp; + /* + * Chain request into list of outstanding requests. + */ + NFSLOCKREQ(); + TAILQ_INSERT_TAIL(&nfsd_reqq, rep, r_chain); + NFSUNLOCKREQ(); + } + } + + nd->nd_mrep = NULL; + stat = CLNT_CALL_MBUF(nrp->nr_client, &ext, procnum, nd->nd_mreq, + &nd->nd_mrep, timo); + + if (rep != NULL) { + /* + * RPC done, unlink the request. + */ + NFSLOCKREQ(); + TAILQ_REMOVE(&nfsd_reqq, rep, r_chain); + NFSUNLOCKREQ(); + } + + /* + * If there was a successful reply and a tprintf msg. + * tprintf a response. + */ + if (stat == RPC_SUCCESS) { + error = 0; + } else if (stat == RPC_TIMEDOUT) { + error = ETIMEDOUT; + } else if (stat == RPC_VERSMISMATCH) { + error = EOPNOTSUPP; + } else if (stat == RPC_PROGVERSMISMATCH) { + error = EPROTONOSUPPORT; + } else { + error = EACCES; + } + if (error) { + m_freem(nd->nd_mreq); + AUTH_DESTROY(auth); + if (rep != NULL) + FREE((caddr_t)rep, M_NFSDREQ); + return (error); + } + + KASSERT(nd->nd_mrep != NULL, ("mrep shouldn't be NULL if no error\n")); + + nd->nd_md = nd->nd_mrep; + nd->nd_dpos = NFSMTOD(nd->nd_md, caddr_t); + nd->nd_repstat = 0; + if (nd->nd_procnum != NFSPROC_NULL) { + /* + * and now the actual NFS xdr. + */ + NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); + nd->nd_repstat = fxdr_unsigned(u_int32_t, *tl); + if (nd->nd_repstat != 0) { + if ((nd->nd_repstat == NFSERR_DELAY && + (nd->nd_flag & ND_NFSV4) && + nd->nd_procnum != NFSPROC_SETATTR && + nd->nd_procnum != NFSPROC_READ && + nd->nd_procnum != NFSPROC_WRITE && + nd->nd_procnum != NFSPROC_OPEN && + nd->nd_procnum != NFSPROC_CREATE && + nd->nd_procnum != NFSPROC_OPENCONFIRM && + nd->nd_procnum != NFSPROC_OPENDOWNGRADE && + nd->nd_procnum != NFSPROC_CLOSE && + nd->nd_procnum != NFSPROC_LOCK && + nd->nd_procnum != NFSPROC_LOCKU) || + (nd->nd_repstat == NFSERR_DELAY && + (nd->nd_flag & ND_NFSV4) == 0) || + nd->nd_repstat == NFSERR_RESOURCE) { + if (trylater_delay > NFS_TRYLATERDEL) + trylater_delay = NFS_TRYLATERDEL; + waituntil = NFSD_MONOSEC + trylater_delay; + while (NFSD_MONOSEC < waituntil) + (void) nfs_catnap(PZERO, "nfstry"); + trylater_delay *= 2; + goto tryagain; + } + + /* + * If the File Handle was stale, invalidate the + * lookup cache, just in case. + * (vp != NULL implies a client side call) + */ + if (nd->nd_repstat == ESTALE && vp != NULL) { + cache_purge(vp); + if (ncl_call_invalcaches != NULL) + (*ncl_call_invalcaches)(vp); + } + } + + /* + * Get rid of the tag, return count, and PUTFH result for V4. + */ + if (nd->nd_flag & ND_NFSV4) { + NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED); + i = fxdr_unsigned(int, *tl); + error = nfsm_advance(nd, NFSM_RNDUP(i), -1); + if (error) + goto nfsmout; + NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED); + i = fxdr_unsigned(int, *++tl); + + /* + * If the first op's status is non-zero, mark that + * there is no more data to process. + */ + if (*++tl) + nd->nd_flag |= ND_NOMOREDATA; + + /* + * If the first op is Putfh, throw its results away + * and toss the op# and status for the first op. + */ + if (nmp != NULL && i == NFSV4OP_PUTFH && *tl == 0) { + NFSM_DISSECT(tl,u_int32_t *,2 * NFSX_UNSIGNED); + i = fxdr_unsigned(int, *tl++); + j = fxdr_unsigned(int, *tl); + /* + * All Compounds that do an Op that must + * be in sequence consist of NFSV4OP_PUTFH + * followed by one of these. As such, we + * can determine if the seqid# should be + * incremented, here. + */ + if ((i == NFSV4OP_OPEN || + i == NFSV4OP_OPENCONFIRM || + i == NFSV4OP_OPENDOWNGRADE || + i == NFSV4OP_CLOSE || + i == NFSV4OP_LOCK || + i == NFSV4OP_LOCKU) && + (j == 0 || + (j != NFSERR_STALECLIENTID && + j != NFSERR_STALESTATEID && + j != NFSERR_BADSTATEID && + j != NFSERR_BADSEQID && + j != NFSERR_BADXDR && + j != NFSERR_RESOURCE && + j != NFSERR_NOFILEHANDLE))) + nd->nd_flag |= ND_INCRSEQID; + /* + * If the first op's status is non-zero, mark + * that there is no more data to process. + */ + if (j) + nd->nd_flag |= ND_NOMOREDATA; + } + + /* + * If R_DONTRECOVER is set, replace the stale error + * reply, so that recovery isn't initiated. + */ + if ((nd->nd_repstat == NFSERR_STALECLIENTID || + nd->nd_repstat == NFSERR_STALESTATEID) && + rep != NULL && (rep->r_flags & R_DONTRECOVER)) + nd->nd_repstat = NFSERR_STALEDONTRECOVER; + } + + m_freem(nd->nd_mreq); + AUTH_DESTROY(auth); + if (rep != NULL) + FREE((caddr_t)rep, M_NFSDREQ); + return (0); + } + error = EPROTONOSUPPORT; +nfsmout: + mbuf_freem(nd->nd_mrep); + mbuf_freem(nd->nd_mreq); + AUTH_DESTROY(auth); + if (rep != NULL) + FREE((caddr_t)rep, M_NFSDREQ); + return (error); +} + +/* + * Mark all of an nfs mount's outstanding requests with R_SOFTTERM and + * wait for all requests to complete. This is used by forced unmounts + * to terminate any outstanding RPCs. + */ +int +newnfs_nmcancelreqs(struct nfsmount *nmp) +{ + + if (nmp->nm_sockreq.nr_client != NULL) + CLNT_CLOSE(nmp->nm_sockreq.nr_client); + return (0); +} + +/* + * Any signal that can interrupt an NFS operation in an intr mount + * should be added to this set. SIGSTOP and SIGKILL cannot be masked. + */ +int newnfs_sig_set[] = { + SIGINT, + SIGTERM, + SIGHUP, + SIGKILL, + SIGSTOP, + SIGQUIT +}; + +/* + * Check to see if one of the signals in our subset is pending on + * the process (in an intr mount). + */ +static int +nfs_sig_pending(sigset_t set) +{ + int i; + + for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) + if (SIGISMEMBER(set, newnfs_sig_set[i])) + return (1); + return (0); +} + +/* + * The set/restore sigmask functions are used to (temporarily) overwrite + * the process p_sigmask during an RPC call (for example). These are also + * used in other places in the NFS client that might tsleep(). + */ +void +newnfs_set_sigmask(struct thread *td, sigset_t *oldset) +{ + sigset_t newset; + int i; + struct proc *p; + + SIGFILLSET(newset); + if (td == NULL) + td = curthread; /* XXX */ + p = td->td_proc; + /* Remove the NFS set of signals from newset */ + PROC_LOCK(p); + mtx_lock(&p->p_sigacts->ps_mtx); + for (i = 0 ; i < sizeof(newnfs_sig_set)/sizeof(int) ; i++) { + /* + * But make sure we leave the ones already masked + * by the process, ie. remove the signal from the + * temporary signalmask only if it wasn't already + * in p_sigmask. + */ + if (!SIGISMEMBER(td->td_sigmask, newnfs_sig_set[i]) && + !SIGISMEMBER(p->p_sigacts->ps_sigignore, newnfs_sig_set[i])) + SIGDELSET(newset, newnfs_sig_set[i]); + } + mtx_unlock(&p->p_sigacts->ps_mtx); + PROC_UNLOCK(p); + kern_sigprocmask(td, SIG_SETMASK, &newset, oldset, 0); +} + +void +newnfs_restore_sigmask(struct thread *td, sigset_t *set) +{ + if (td == NULL) + td = curthread; /* XXX */ + kern_sigprocmask(td, SIG_SETMASK, set, NULL, 0); +} + +/* + * NFS wrapper to msleep(), that shoves a new p_sigmask and restores the + * old one after msleep() returns. + */ +int +newnfs_msleep(struct thread *td, void *ident, struct mtx *mtx, int priority, char *wmesg, int timo) +{ + sigset_t oldset; + int error; + struct proc *p; + + if ((priority & PCATCH) == 0) + return msleep(ident, mtx, priority, wmesg, timo); + if (td == NULL) + td = curthread; /* XXX */ + newnfs_set_sigmask(td, &oldset); + error = msleep(ident, mtx, priority, wmesg, timo); + newnfs_restore_sigmask(td, &oldset); + p = td->td_proc; + return (error); +} + +/* + * Test for a termination condition pending on the process. + * This is used for NFSMNT_INT mounts. + */ +int +newnfs_sigintr(struct nfsmount *nmp, struct thread *td) +{ + struct proc *p; + sigset_t tmpset; + + /* Terminate all requests while attempting a forced unmount. */ + if (nmp->nm_mountp->mnt_kern_flag & MNTK_UNMOUNTF) + return (EIO); + if (!(nmp->nm_flag & NFSMNT_INT)) + return (0); + if (td == NULL) + return (0); + p = td->td_proc; + PROC_LOCK(p); + tmpset = p->p_siglist; + SIGSETOR(tmpset, td->td_siglist); + SIGSETNAND(tmpset, td->td_sigmask); + mtx_lock(&p->p_sigacts->ps_mtx); + SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore); + mtx_unlock(&p->p_sigacts->ps_mtx); + if ((SIGNOTEMPTY(p->p_siglist) || SIGNOTEMPTY(td->td_siglist)) + && nfs_sig_pending(tmpset)) { + PROC_UNLOCK(p); + return (EINTR); + } + PROC_UNLOCK(p); + return (0); +} + +static int +nfs_msg(struct thread *td, const char *server, const char *msg, int error) +{ + struct proc *p; + + p = td ? td->td_proc : NULL; + if (error) { + tprintf(p, LOG_INFO, "newnfs server %s: %s, error %d\n", + server, msg, error); + } else { + tprintf(p, LOG_INFO, "newnfs server %s: %s\n", server, msg); + } + return (0); +} + +static void +nfs_down(struct nfsmount *nmp, struct thread *td, const char *msg, + int error, int flags) +{ + if (nmp == NULL) + return; + mtx_lock(&nmp->nm_mtx); + if ((flags & NFSSTA_TIMEO) && !(nmp->nm_state & NFSSTA_TIMEO)) { + nmp->nm_state |= NFSSTA_TIMEO; + mtx_unlock(&nmp->nm_mtx); + vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, + VQ_NOTRESP, 0); + } else + mtx_unlock(&nmp->nm_mtx); + mtx_lock(&nmp->nm_mtx); + if ((flags & NFSSTA_LOCKTIMEO) && !(nmp->nm_state & NFSSTA_LOCKTIMEO)) { + nmp->nm_state |= NFSSTA_LOCKTIMEO; + mtx_unlock(&nmp->nm_mtx); + vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, + VQ_NOTRESPLOCK, 0); + } else + mtx_unlock(&nmp->nm_mtx); + nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, error); +} + +static void +nfs_up(struct nfsmount *nmp, struct thread *td, const char *msg, + int flags, int tprintfmsg) +{ + if (nmp == NULL) + return; + if (tprintfmsg) { + nfs_msg(td, nmp->nm_mountp->mnt_stat.f_mntfromname, msg, 0); + } + + mtx_lock(&nmp->nm_mtx); + if ((flags & NFSSTA_TIMEO) && (nmp->nm_state & NFSSTA_TIMEO)) { + nmp->nm_state &= ~NFSSTA_TIMEO; + mtx_unlock(&nmp->nm_mtx); + vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, + VQ_NOTRESP, 1); + } else + mtx_unlock(&nmp->nm_mtx); + + mtx_lock(&nmp->nm_mtx); + if ((flags & NFSSTA_LOCKTIMEO) && (nmp->nm_state & NFSSTA_LOCKTIMEO)) { + nmp->nm_state &= ~NFSSTA_LOCKTIMEO; + mtx_unlock(&nmp->nm_mtx); + vfs_event_signal(&nmp->nm_mountp->mnt_stat.f_fsid, + VQ_NOTRESPLOCK, 1); + } else + mtx_unlock(&nmp->nm_mtx); +} + |