/*
* Copyright 2000, International Business Machines Corporation and others.
* All Rights Reserved.
- *
+ *
* This software has been released under the terms of the IBM Public
* License. For details, see the LICENSE file in the top-level source
* directory or online at http://www.openafs.org/dl/license10.html
#include <afsconfig.h>
#include "afs/param.h"
-RCSID
- ("$Header$");
#include "afs/stds.h"
#include "afs/sysincludes.h" /* Standard vendor system headers */
#ifdef AFS_SGI62_ENV
#include "h/hashing.h"
#endif
-#if !defined(AFS_HPUX110_ENV) && !defined(AFS_LINUX20_ENV) && !defined(AFS_DARWIN60_ENV)
+#if !defined(AFS_HPUX110_ENV) && !defined(AFS_LINUX20_ENV) && !defined(AFS_DARWIN_ENV)
#include <netinet/in_var.h>
#endif /* ! AFS_HPUX110_ENV */
#endif /* !defined(UKERNEL) */
#include "afsincludes.h" /* Afs-based standard headers */
#include "afs/afs_stats.h" /* afs statistics */
-#if defined(AFS_SUN56_ENV)
+#if defined(AFS_SUN5_ENV)
#include <inet/led.h>
#include <inet/common.h>
-#if defined(AFS_SUN58_ENV)
#include <netinet/ip6.h>
-#endif
#include <inet/ip.h>
#endif
afs_rwlock_t afs_xinterface; /* for multiple client address */
afs_int32 cryptall = 0; /* encrypt all communications */
+/* some connection macros */
+
+/* a constructor */
+#define new_conn_vector(xcv) \
+do { \
+ xcv = (struct sa_conn_vector *) \
+ afs_osi_Alloc(sizeof(struct sa_conn_vector)); \
+ if (xcv) { \
+ memset((char *)xcv, 0, sizeof(struct sa_conn_vector)); \
+ } \
+} while (0);
+
+/* select a connection to return (if no connection has lower utilization
+ * than any other) */
+#define conn_vec_select_conn(xcv, bix, conn) \
+do { \
+ (bix) = ((xcv)->select_index)++ % CVEC_LEN; \
+ (conn) = &((xcv)->cvec[bix]); \
+} while (0);
+
+#define struct_conn(s) ((struct afs_conn *)(s))
+
+#define REPORT_CONNECTIONS_ISSUED 0 /* enable to see utilization */
+
+/**
+ * Find a connection with call slots available, allocating one
+ * if nothing is available and we find an allocated slot
+ * @param xcv A connection vector
+ * @param create If set, a new connection may be created
+ */
+static struct afs_conn *
+find_preferred_connection(struct sa_conn_vector *xcv, int create)
+{
+ afs_int32 cix, bix;
+ struct afs_conn *tc = NULL;
+
+ bix = -1;
+ for(cix = 0; cix < CVEC_LEN; ++cix) {
+ tc = &(xcv->cvec[cix]);
+ if (!tc->id) {
+ if (create) {
+ tc->parent = xcv;
+ tc->forceConnectFS = 1;
+ tc->activated = 1;
+ bix = cix;
+ break;
+ } /* create */
+ } else {
+ if (tc->refCount < (RX_MAXCALLS-1)) {
+ bix = cix;
+ goto f_conn;
+ } else if (cix == (CVEC_LEN-1))
+ conn_vec_select_conn(xcv, bix, tc);
+ } /* tc->id */
+ } /* for cix < CVEC_LEN */
+
+ if (bix < 0) {
+ afs_warn("find_preferred_connection: no connection and !create\n");
+ tc = NULL;
+ goto out;
+ }
+
+f_conn:
+ tc->refCount++;
+ xcv->refCount++;
+
+#if REPORT_CONNECTIONS_ISSUED
+ afs_warn("Issuing conn %d refCount=%d parent refCount=%d\n", bix,
+ tc->refCount, xcv->refCount);
+#endif
+
+out:
+ return (tc);
+
+} /* find_preferred_connection */
+
+
+/**
+ * Release all connections for unix user xu at server xs
+ * @param xu
+ * @param xs
+ */
+static void
+release_conns_user_server(struct unixuser *xu, struct server *xs)
+{
+ int cix, glocked;
+ struct srvAddr *sa;
+ struct afs_conn *tc;
+ struct sa_conn_vector *tcv, **lcv;
+ for (sa = (xs)->addr; sa; sa = sa->next_sa) {
+ lcv = &sa->conns;
+ for (tcv = *lcv; tcv; lcv = &tcv->next, tcv = *lcv) {
+ if (tcv->user == (xu) && tcv->refCount == 0) {
+ *lcv = tcv->next;
+ /* our old friend, the GLOCK */
+ glocked = ISAFS_GLOCK();
+ if (glocked)
+ AFS_GUNLOCK();
+ for(cix = 0; cix < CVEC_LEN; ++cix) {
+ tc = &(tcv->cvec[cix]);
+ if (tc->activated)
+ rx_DestroyConnection(tc->id);
+ }
+ if (glocked)
+ AFS_GLOCK();
+ afs_osi_Free(tcv, sizeof(struct sa_conn_vector));
+ break; /* at most one instance per server */
+ } /*Found unreferenced connection for user */
+ }
+ } /*For each connection on the server */
+
+} /* release_conns_user_server */
+
+
+static void
+release_conns_vector(struct sa_conn_vector *xcv)
+{
+ int cix, glocked;
+ struct afs_conn *tc;
+ struct sa_conn_vector *tcv = NULL;
+ struct sa_conn_vector **lcv = NULL;
+ for (tcv = xcv; tcv; lcv = &tcv->next, tcv = *lcv) {
+ *lcv = tcv->next;
+ /* you know it, you love it, the GLOCK */
+ glocked = ISAFS_GLOCK();
+ if (glocked)
+ AFS_GUNLOCK(); \
+ for(cix = 0; cix < CVEC_LEN; ++cix) {
+ tc = &(tcv->cvec[cix]);
+ if (tc->activated)
+ rx_DestroyConnection( tc->id );
+ }
+ if (glocked)
+ AFS_GLOCK();
+ afs_osi_Free(tcv, sizeof(struct sa_conn_vector));
+ }
+
+} /* release_conns_vector */
+
unsigned int VNOSERVERS = 0;
-struct conn *
-afs_Conn(register struct VenusFid *afid, register struct vrequest *areq,
- afs_int32 locktype)
+
+/**
+ * Pick a security object to use for a connection to a given server,
+ * by a given user
+ *
+ * @param[in] conn
+ * The AFS connection for which the security object is required
+ * @param[out] secLevel
+ * The security level of the returned object
+ *
+ * @return
+ * An rx security object. This function is guaranteed to return
+ * an object, although that object may be rxnull (with a secLevel
+ * of 0)
+ */
+static struct rx_securityClass *
+afs_pickSecurityObject(struct afs_conn *conn, int *secLevel)
+{
+ struct rx_securityClass *secObj = NULL;
+ union tokenUnion *token;
+
+ /* Do we have tokens ? */
+ if (conn->parent->user->states & UHasTokens) {
+ token = afs_FindToken(conn->parent->user->tokens, RX_SECIDX_KAD);
+ if (token) {
+ *secLevel = RX_SECIDX_KAD;
+ /* kerberos tickets on channel 2 */
+ secObj = rxkad_NewClientSecurityObject(
+ cryptall ? rxkad_crypt : rxkad_clear,
+ (struct ktc_encryptionKey *)
+ token->rxkad.clearToken.HandShakeKey,
+ token->rxkad.clearToken.AuthHandle,
+ token->rxkad.ticketLen, token->rxkad.ticket);
+ /* We're going to use this token, so populate the viced */
+ conn->parent->user->viceId = token->rxkad.clearToken.ViceId;
+ }
+ }
+ if (secObj == NULL) {
+ *secLevel = 0;
+ secObj = rxnull_NewClientSecurityObject();
+ }
+
+ return secObj;
+}
+
+
+/**
+ * Try setting up a connection to the server containing the specified fid.
+ * Gets the volume, checks if it's up and does the connection by server address.
+ *
+ * @param afid
+ * @param areq Request filled in by the caller.
+ * @param locktype Type of lock that will be used.
+ *
+ * @return The conn struct, or NULL.
+ */
+struct afs_conn *
+afs_Conn(struct VenusFid *afid, struct vrequest *areq,
+ afs_int32 locktype, struct rx_connection **rxconn)
{
u_short fsport = AFS_FSPORT;
struct volume *tv;
- struct conn *tconn = NULL;
+ struct afs_conn *tconn = NULL;
struct srvAddr *lowp = NULL;
struct unixuser *tu;
int notbusy;
int i;
struct srvAddr *sa1p;
+ *rxconn = NULL;
+
AFS_STATCNT(afs_Conn);
+ /* Get fid's volume. */
tv = afs_GetVolume(afid, areq, READ_LOCK);
if (!tv) {
if (areq) {
/* First is always lowest rank, if it's up */
if ((tv->status[0] == not_busy) && tv->serverHost[0]
- && !(tv->serverHost[0]->addr->sa_flags & SRVR_ISDOWN))
+ && !(tv->serverHost[0]->addr->sa_flags & SRVR_ISDOWN) &&
+ !(((areq->idleError > 0) || (areq->tokenError > 0))
+ && (areq->skipserver[0] == 1)))
lowp = tv->serverHost[0]->addr;
/* Otherwise we look at all of them. There are seven levels of
* in this time).
*/
for (notbusy = not_busy; (!lowp && (notbusy <= end_not_busy)); notbusy++) {
- for (i = 0; i < MAXHOSTS && tv->serverHost[i]; i++) {
+ for (i = 0; i < AFS_MAXHOSTS && tv->serverHost[i]; i++) {
+ if (((areq->tokenError > 0)||(areq->idleError > 0))
+ && (areq->skipserver[i] == 1))
+ continue;
if (tv->status[i] != notbusy) {
if (tv->status[i] == rd_busy || tv->status[i] == rdwr_busy) {
if (!areq->busyCount)
if (lowp) {
tu = afs_GetUser(areq->uid, afid->Cell, SHARED_LOCK);
tconn = afs_ConnBySA(lowp, fsport, afid->Cell, tu, 0 /*!force */ ,
- 1 /*create */ , locktype);
+ 1 /*create */ , locktype, rxconn);
afs_PutUser(tu, SHARED_LOCK);
}
} /*afs_Conn */
-struct conn *
+/**
+ * Connects to a server by it's server address.
+ *
+ * @param sap Server address.
+ * @param aport Server port.
+ * @param acell
+ * @param tu Connect as this user.
+ * @param force_if_down
+ * @param create
+ * @param locktype Specifies type of lock to be used for this function.
+ *
+ * @return The new connection.
+ */
+struct afs_conn *
afs_ConnBySA(struct srvAddr *sap, unsigned short aport, afs_int32 acell,
struct unixuser *tu, int force_if_down, afs_int32 create,
- afs_int32 locktype)
+ afs_int32 locktype, struct rx_connection **rxconn)
{
- struct conn *tc = 0;
- struct rx_securityClass *csec; /*Security class object */
- int isec; /*Security index */
+ int glocked, foundvec;
+ struct afs_conn *tc = NULL;
+ struct sa_conn_vector *tcv = NULL;
+ struct rx_securityClass *csec; /*Security class object */
+ int isec; /*Security index */
int service;
- if (!sap || ((sap->sa_flags & SRVR_ISDOWN) && !force_if_down)) {
- /* sa is known down, and we don't want to force it. */
- return NULL;
- }
+ *rxconn = NULL;
+ /* find cached connection */
ObtainSharedLock(&afs_xconn, 15);
- for (tc = sap->conns; tc; tc = tc->next) {
- if (tc->user == tu && tc->port == aport) {
- break;
- }
+ foundvec = 0;
+ for (tcv = sap->conns; tcv; tcv = tcv->next) {
+ if (tcv->user == tu && tcv->port == aport) {
+ /* return most eligible conn */
+ if (!foundvec)
+ foundvec = 1;
+ UpgradeSToWLock(&afs_xconn, 37);
+ tc = find_preferred_connection(tcv, create);
+ ConvertWToSLock(&afs_xconn);
+ break;
+ }
}
if (!tc && !create) {
- ReleaseSharedLock(&afs_xconn);
- return NULL;
+ /* Not found and can't create a new one. */
+ ReleaseSharedLock(&afs_xconn);
+ return NULL;
}
- if (!tc) {
- /* No such connection structure exists. Create one and splice it in.
+ if (AFS_IS_DISCONNECTED && !AFS_IN_SYNC) {
+ afs_warnuser("afs_ConnBySA: disconnected\n");
+ ReleaseSharedLock(&afs_xconn);
+ return NULL;
+ }
+
+ if (!foundvec && create) {
+ /* No such connection vector exists. Create one and splice it in.
* Make sure the server record has been marked as used (for the purposes
* of calculating up & down times, it's now considered to be an
* ``active'' server). Also make sure the server's lastUpdateEvalTime
* gets set, marking the time of its ``birth''.
*/
UpgradeSToWLock(&afs_xconn, 37);
- tc = (struct conn *)afs_osi_Alloc(sizeof(struct conn));
- memset((char *)tc, 0, sizeof(struct conn));
-
- tc->user = tu;
- tc->port = aport;
- tc->srvr = sap;
- tc->refCount = 0; /* bumped below */
- tc->forceConnectFS = 1;
- tc->id = (struct rx_connection *)0;
- tc->next = sap->conns;
- sap->conns = tc;
+ new_conn_vector(tcv);
+
+ tcv->user = tu;
+ tcv->port = aport;
+ tcv->srvr = sap;
+ tcv->next = sap->conns;
+ sap->conns = tcv;
+
+ /* all struct afs_conn ptrs come from here */
+ tc = find_preferred_connection(tcv, create);
+
afs_ActivateServer(sap);
ConvertWToSLock(&afs_xconn);
+ } /* end of if (!tcv) */
+
+ if (!tc) {
+ /* Not found and no alternatives. */
+ ReleaseSharedLock(&afs_xconn);
+ return NULL;
}
- tc->refCount++;
if (tu->states & UTokensBad) {
/* we may still have an authenticated RPC connection here,
if (tc->id && (rx_SecurityClassOf(tc->id) != 0)) {
tc->forceConnectFS = 1; /* force recreation of connection */
}
- tu->vid = UNDEFVID; /* forcibly disconnect the authentication info */
+ tu->states &= ~UHasTokens; /* remove the authentication info */
}
+ glocked = ISAFS_GLOCK();
if (tc->forceConnectFS) {
UpgradeSToWLock(&afs_xconn, 38);
csec = (struct rx_securityClass *)0;
if (tc->id) {
- AFS_GUNLOCK();
+ if (glocked)
+ AFS_GUNLOCK();
rx_DestroyConnection(tc->id);
- AFS_GLOCK();
+ if (glocked)
+ AFS_GLOCK();
}
/*
* Stupid hack to determine if using vldb service or file system
else
service = 1;
isec = 0;
- if (tu->vid != UNDEFVID) {
- int level;
- if (cryptall) {
- level = rxkad_crypt;
- } else {
- level = rxkad_clear;
- }
- isec = 2;
- /* kerberos tickets on channel 2 */
- csec = rxkad_NewClientSecurityObject(level, tu->ct.HandShakeKey,
- /* kvno */
- tu->ct.AuthHandle, tu->stLen,
- tu->stp);
- }
- if (isec == 0)
- csec = rxnull_NewClientSecurityObject();
- AFS_GUNLOCK();
+ csec = afs_pickSecurityObject(tc, &isec);
+
+ if (glocked)
+ AFS_GUNLOCK();
tc->id = rx_NewConnection(sap->sa_ip, aport, service, csec, isec);
- AFS_GLOCK();
+ if (glocked)
+ AFS_GLOCK();
if (service == 52) {
rx_SetConnHardDeadTime(tc->id, afs_rx_harddead);
}
+ /* set to a RX_CALL_TIMEOUT error to allow MTU retry to trigger */
+ rx_SetServerConnIdleDeadErr(tc->id, RX_CALL_DEAD);
+ rx_SetConnIdleDeadTime(tc->id, afs_rx_idledead);
+ rx_SetMsgsizeRetryErr(tc->id, RX_MSGSIZE);
+
+ /*
+ * Only do this for the base connection, not per-user.
+ * Will need to be revisited if/when CB gets security.
+ */
+ if ((isec == 0) && (service != 52) && !(tu->states & UTokensBad) &&
+ (tu->viceId == UNDEFVID))
+ rx_SetConnSecondsUntilNatPing(tc->id, 20);
tc->forceConnectFS = 0; /* apparently we're appropriately connected now */
if (csec)
rxs_Release(csec);
ConvertWToSLock(&afs_xconn);
- }
+ } /* end of if (tc->forceConnectFS)*/
+
+ *rxconn = tc->id;
+ rx_GetConnection(*rxconn);
ReleaseSharedLock(&afs_xconn);
return tc;
}
-/*
- * afs_ConnByHost
- *
+/**
* forceConnectFS is set whenever we must recompute the connection. UTokensBad
* is true only if we know that the tokens are bad. We thus clear this flag
* when we get a new set of tokens..
* Having force... true and UTokensBad true simultaneously means that the tokens
* went bad and we're supposed to create a new, unauthenticated, connection.
+ *
+ * @param aserver Server to connect to.
+ * @param aport Connection port.
+ * @param acell The cell where all of this happens.
+ * @param areq The request.
+ * @param aforce Force connection?
+ * @param locktype Type of lock to be used.
+ *
+ * @return The established connection.
*/
-struct conn *
+struct afs_conn *
afs_ConnByHost(struct server *aserver, unsigned short aport, afs_int32 acell,
- struct vrequest *areq, int aforce, afs_int32 locktype)
+ struct vrequest *areq, int aforce, afs_int32 locktype,
+ struct rx_connection **rxconn)
{
struct unixuser *tu;
- struct conn *tc = 0;
- struct srvAddr *sa = 0;
+ struct afs_conn *tc = NULL;
+ struct srvAddr *sa = NULL;
+
+ *rxconn = NULL;
AFS_STATCNT(afs_ConnByHost);
-/*
+
+ if (AFS_IS_DISCONNECTED && !AFS_IN_SYNC) {
+ afs_warnuser("afs_ConnByHost: disconnected\n");
+ return NULL;
+ }
+
+/*
1. look for an existing connection
2. create a connection at an address believed to be up
(if aforce is true, create a connection at the first address)
for (sa = aserver->addr; sa; sa = sa->next_sa) {
tc = afs_ConnBySA(sa, aport, acell, tu, aforce,
0 /*don't create one */ ,
- locktype);
+ locktype, rxconn);
if (tc)
break;
}
for (sa = aserver->addr; sa; sa = sa->next_sa) {
tc = afs_ConnBySA(sa, aport, acell, tu, aforce,
1 /*create one */ ,
- locktype);
+ locktype, rxconn);
if (tc)
break;
}
} /*afs_ConnByHost */
-struct conn *
+/**
+ * Connect by multiple hosts.
+ * Try to connect to one of the hosts from the ahosts array.
+ *
+ * @param ahosts Multiple hosts to connect to.
+ * @param aport Connection port.
+ * @param acell The cell where all of this happens.
+ * @param areq The request.
+ * @param locktype Type of lock to be used.
+ *
+ * @return The established connection or NULL.
+ */
+struct afs_conn *
afs_ConnByMHosts(struct server *ahosts[], unsigned short aport,
- afs_int32 acell, register struct vrequest *areq,
- afs_int32 locktype)
+ afs_int32 acell, struct vrequest *areq,
+ afs_int32 locktype, struct rx_connection **rxconn)
{
- register afs_int32 i;
- register struct conn *tconn;
- register struct server *ts;
+ afs_int32 i;
+ struct afs_conn *tconn;
+ struct server *ts;
+
+ *rxconn = NULL;
/* try to find any connection from the set */
AFS_STATCNT(afs_ConnByMHosts);
- for (i = 0; i < MAXCELLHOSTS; i++) {
+ for (i = 0; i < AFS_MAXCELLHOSTS; i++) {
if ((ts = ahosts[i]) == NULL)
break;
- tconn = afs_ConnByHost(ts, aport, acell, areq, 0, locktype);
+ tconn = afs_ConnByHost(ts, aport, acell, areq, 0, locktype, rxconn);
if (tconn) {
return tconn;
}
} /*afs_ConnByMHosts */
+/**
+ * Decrement reference count to this connection.
+ * @param ac
+ * @param locktype
+ */
void
-afs_PutConn(register struct conn *ac, afs_int32 locktype)
+afs_PutConn(struct afs_conn *ac, struct rx_connection *rxconn,
+ afs_int32 locktype)
{
AFS_STATCNT(afs_PutConn);
ac->refCount--;
+ ac->parent->refCount--;
+ rx_PutConnection(rxconn);
} /*afs_PutConn */
-/* for multi homed clients, an RPC may timeout because of a
-client network interface going down. We need to reopen new
-connections in this case
-*/
+/**
+ * Free up a connection vector, allowing, eg, code in afs_user.c
+ * to ignore how connections are stored/pooled
+ * @param tcv
+ */
+void
+afs_ReleaseConns(struct sa_conn_vector *tcv) {
+ release_conns_vector(tcv);
+}
+
+
+/**
+ * Free connection vector(s) for a user
+ * @param au
+ */
+void
+afs_ReleaseConnsUser(struct unixuser *au) {
+
+ int i;
+ struct server *ts;
+
+ for (i = 0; i < NSERVERS; i++) {
+ for (ts = afs_servers[i]; ts; ts = ts->next) {
+ release_conns_user_server(au, ts);
+ } /*For each server on chain */
+ } /*For each chain */
+}
+
+
+/**
+ * For multi homed clients, a RPC may timeout because of a
+ * client network interface going down. We need to reopen new
+ * connections in this case.
+ *
+ * @param sap Server address.
+ */
void
ForceNewConnections(struct srvAddr *sap)
{
- struct conn *tc = 0;
+ int cix;
+ struct afs_conn *tc = NULL;
+ struct sa_conn_vector *tcv = NULL;
if (!sap)
- return; /* defensive check */
-
- /* if client is not multihomed, do nothing */
- ObtainReadLock(&afs_xinterface);
- if (afs_cb_interface.numberOfInterfaces <= 1) {
- ReleaseReadLock(&afs_xinterface);
- return;
- }
- ReleaseReadLock(&afs_xinterface);
+ return; /* defensive check */
ObtainWriteLock(&afs_xconn, 413);
- for (tc = sap->conns; tc; tc = tc->next)
- tc->forceConnectFS = 1;
+ for (tcv = sap->conns; tcv; tcv = tcv->next) {
+ for(cix = 0; cix < CVEC_LEN; ++cix) {
+ tc = &(tcv->cvec[cix]);
+ if (tc->activated)
+ tc->forceConnectFS = 1;
+ }
+ }
ReleaseWriteLock(&afs_xconn);
}
+
+
git://git.openafs.org / openafs.git / blobdiff