/*
* 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
*
- * Portions Copyright (c) 2006 Sine Nomine Associates
+ * Portions Copyright (c) 2006,2008 Sine Nomine Associates
*/
/*
Institution: The Information Technology Center, Carnegie-Mellon University
*/
-#ifdef notdef
-
-/* All this is going away in early 1989 */
-int newVLDB; /* Compatibility flag */
-
-#endif
-static int newVLDB = 1;
-
#ifndef AFS_PTHREAD_ENV
#define USUAL_PRIORITY (LWP_MAX_PRIORITY - 2)
#include <afsconfig.h>
#include <afs/param.h>
-RCSID
- ("$Header$");
-
-#include <sys/types.h>
-#include <stdio.h>
-#ifdef AFS_NT40_ENV
-#include <winsock2.h>
-#include <time.h>
-#else
-#include <sys/param.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <sys/time.h>
-#endif
-#include <errno.h>
-#ifdef AFS_PTHREAD_ENV
-#include <assert.h>
-#else /* AFS_PTHREAD_ENV */
-#include <afs/assert.h>
-#endif /* AFS_PTHREAD_ENV */
-#include <signal.h>
-#include <string.h>
+#include <roken.h>
#include <rx/xdr.h>
#include <afs/afsint.h>
-#include "nfs.h"
#include <afs/errors.h>
+#include <afs/afssyscalls.h>
+
+#include "nfs.h"
#include "daemon_com.h"
#include "fssync.h"
#include "lwp.h"
#include "lock.h"
-#include <afs/afssyscalls.h>
#include "ihandle.h"
#include "vnode.h"
#include "volume.h"
#include "partition.h"
+#include "common.h"
#ifdef FSSYNC_BUILD_CLIENT
-/*@printflike@*/ extern void Log(const char *format, ...);
-
-#ifdef osi_Assert
-#undef osi_Assert
-#endif
-#define osi_Assert(e) (void)(e)
-
extern int LogLevel;
-static SYNC_client_state fssync_state = { -1, 2040, FSYNC_PROTO_VERSION, 5, 120 };
+static SYNC_client_state fssync_state =
+ { -1, /* file descriptor */
+ FSSYNC_ENDPOINT_DECL, /* server endpoint */
+ FSYNC_PROTO_VERSION, /* protocol version */
+ 5, /* connect retry limit */
+ 120, /* hard timeout */
+ "FSSYNC", /* protocol name string */
+ };
#ifdef AFS_PTHREAD_ENV
static pthread_mutex_t vol_fsync_mutex;
-static volatile vol_fsync_mutex_init = 0;
-#define VFSYNC_LOCK \
- assert(pthread_mutex_lock(&vol_fsync_mutex) == 0)
-#define VFSYNC_UNLOCK \
- assert(pthread_mutex_unlock(&vol_fsync_mutex) == 0)
+static volatile int vol_fsync_mutex_init = 0;
+#define VFSYNC_LOCK MUTEX_ENTER(&vol_fsync_mutex)
+#define VFSYNC_UNLOCK MUTEX_EXIT(&vol_fsync_mutex)
#else
#define VFSYNC_LOCK
#define VFSYNC_UNLOCK
#ifdef AFS_PTHREAD_ENV
/* this is safe since it gets called with VOL_LOCK held, or before we go multithreaded */
if (!vol_fsync_mutex_init) {
- assert(pthread_mutex_init(&vol_fsync_mutex, NULL) == 0);
+ MUTEX_INIT(&vol_fsync_mutex, "vol fsync", MUTEX_DEFAULT, 0);
vol_fsync_mutex_init = 1;
}
#endif
break;
case SYNC_COM_ERROR:
case SYNC_BAD_COMMAND:
- Log("FSYNC_askfs: fatal FSSYNC protocol error; volume management functionality disabled until next fileserver restart\n");
+ Log("FSYNC_askfs: internal FSSYNC protocol error %d\n", code);
break;
case SYNC_DENIED:
Log("FSYNC_askfs: FSSYNC request denied for reason=%d\n", res->hdr.reason);
return code;
}
+
+/**
+ * FSSYNC volume operations client interface.
+ *
+ * @param[in] volume volume id
+ * @param[in] partName partition name string
+ * @param[in] com FSSYNC command code
+ * @param[in] reason FSSYNC reason sub-code
+ * @param[out] res response message
+ *
+ * @return operation status
+ * @retval SYNC_OK success
+ */
afs_int32
FSYNC_GenericOp(void * ext_hdr, size_t ext_len,
int command, int reason,
}
afs_int32
-FSYNC_VolOp(VolumeId volume, char * partition,
+FSYNC_VolOp(VolumeId volume, char * partition,
int command, int reason,
SYNC_response * res)
{
return FSYNC_GenericOp(&vcom, sizeof(vcom), command, reason, res);
}
+/**
+ * verify that the fileserver still thinks we have a volume checked out.
+ *
+ * In DAFS, a non-fileserver program accesses a volume by checking it out from
+ * the fileserver (FSYNC_VOL_OFF or FSYNC_VOL_NEEDVOLUME), and then locks the
+ * volume. There is a possibility that the fileserver crashes or restarts for
+ * some reason between volume checkout and locking; if this happens, the
+ * fileserver could attach the volume before we had a chance to lock it. This
+ * function serves to detect if this has happened; it must be called after
+ * volume checkout and locking to make sure the fileserver still thinks we
+ * have the volume. (If it doesn't, we should try to check it out again.)
+ *
+ * @param[in] volume volume ID
+ * @param[in] partition partition name string
+ * @param[in] command the command that was used to checkout the volume
+ * @param[in] reason the reason code used to checkout the volume
+ *
+ * @return operation status
+ * @retval SYNC_OK the fileserver could not have attached the volume since
+ * it was checked out (either it thinks it is still checked
+ * out, or it doesn't know about the volume)
+ * @retval SYNC_DENIED fileserver may have restarted since checkout; checkout
+ * should be reattempted
+ * @retval SYNC_COM_ERROR internal/fatal error
+ */
+afs_int32
+FSYNC_VerifyCheckout(VolumeId volume, char * partition,
+ afs_int32 command, afs_int32 reason)
+{
+ SYNC_response res;
+ FSSYNC_VolOp_info vop;
+ afs_int32 code;
+ afs_int32 pid;
+
+ res.hdr.response_len = sizeof(res.hdr);
+ res.payload.buf = &vop;
+ res.payload.len = sizeof(vop);
+
+ code = FSYNC_VolOp(volume, partition, FSYNC_VOL_QUERY_VOP, FSYNC_WHATEVER, &res);
+ if (code != SYNC_OK) {
+ if (res.hdr.reason == FSYNC_NO_PENDING_VOL_OP) {
+ Log("FSYNC_VerifyCheckout: fileserver claims no vop for vol %lu "
+ "part %s; fileserver may have restarted since checkout\n",
+ afs_printable_uint32_lu(volume), partition);
+ return SYNC_DENIED;
+ }
+
+ if (res.hdr.reason == FSYNC_UNKNOWN_VOLID ||
+ res.hdr.reason == FSYNC_WRONG_PART) {
+ /* if the fileserver does not know about this volume on this
+ * partition, there's no way it could have attached it, so we're
+ * fine */
+ return SYNC_OK;
+ }
+
+ Log("FSYNC_VerifyCheckout: FSYNC_VOL_QUERY_VOP failed for vol %lu "
+ "part %s with code %ld reason %ld\n",
+ afs_printable_uint32_lu(volume), partition,
+ afs_printable_int32_ld(code),
+ afs_printable_int32_ld(res.hdr.reason));
+ return SYNC_COM_ERROR;
+ }
+
+ pid = getpid();
+
+ /* Check if the current vol op is us. Checking pid is probably enough, but
+ * be a little bit paranoid. We could also probably check tid, but I'm not
+ * completely confident of its reliability on all platforms (on pthread
+ * envs, we coerce a pthread_t to an afs_int32, which is not guaranteed
+ * to mean anything significant). */
+
+ if (vop.com.programType == programType && vop.com.pid == pid &&
+ vop.com.command == command && vop.com.reason == reason) {
+
+ /* looks like the current pending vol op is the same one as the one
+ * with which we checked it out. success. */
+ return SYNC_OK;
+ }
+
+ Log("FSYNC_VerifyCheckout: vop for vol %lu part %s does not match "
+ "expectations (got pt %ld pid %ld cmd %ld reason %ld, but expected "
+ "pt %ld pid %ld cmd %ld reason %ld); fileserver may have restarted "
+ "since checkout\n", afs_printable_uint32_lu(volume), partition,
+ afs_printable_int32_ld(vop.com.programType),
+ afs_printable_int32_ld(vop.com.pid),
+ afs_printable_int32_ld(vop.com.command),
+ afs_printable_int32_ld(vop.com.reason),
+ afs_printable_int32_ld(programType),
+ afs_printable_int32_ld(pid),
+ afs_printable_int32_ld(command),
+ afs_printable_int32_ld(reason));
+
+ return SYNC_DENIED;
+}
+
afs_int32
FSYNC_StatsOp(FSSYNC_StatsOp_hdr * scom, int command, int reason,
SYNC_response * res)
return FSYNC_GenericOp(scom, sizeof(*scom), command, reason, res);
}
+/**
+ * query the volume group cache.
+ *
+ * @param[in] part vice partition path
+ * @param[in] volid volume id
+ * @param[out] qry query response object
+ * @param[out] res SYNC response message
+ *
+ * @return operation status
+ * @retval SYNC_OK success
+ */
+afs_int32
+FSYNC_VGCQuery(char * part,
+ VolumeId volid,
+ FSSYNC_VGQry_response_t * qry,
+ SYNC_response *res)
+{
+ SYNC_response lres;
+
+ if (!res) {
+ res = &lres;
+ }
+
+ res->hdr.response_len = sizeof(res->hdr);
+ res->payload.buf = qry;
+ res->payload.len = sizeof(*qry);
+
+ return FSYNC_VolOp(volid, part, FSYNC_VG_QUERY, 0, res);
+}
+
+/**
+ * perform an update operation on the VGC.
+ *
+ * @param[in] parent rw volume
+ * @param[in] child volume id to add
+ * @param[in] partition name of vice partition on which this VG resides
+ * @param[in] opcode FSSYNC VG cache opcode
+ * @param[in] reason FSSYNC reason code
+ * @param[out] res SYNC response message
+ *
+ * @return operation status
+ * @retval SYNC_OK success
+ *
+ * @internal
+ */
+static afs_int32
+_FSYNC_VGCUpdate(char * partition,
+ VolumeId parent,
+ VolumeId child,
+ int opcode,
+ int reason,
+ SYNC_response *res)
+{
+ FSSYNC_VGUpdate_command_t vcom;
+
+ memset(&vcom, 0, sizeof(vcom));
+
+ vcom.parent = parent;
+ vcom.child = child;
+ if (partition)
+ strlcpy(vcom.partName, partition, sizeof(vcom.partName));
+
+ return FSYNC_GenericOp(&vcom, sizeof(vcom), opcode, reason, res);
+}
+
+/**
+ * Add volume to volume group cache.
+ *
+ * @param[in] parent rw volume
+ * @param[in] child volume id to add
+ * @param[in] partition name of vice partition on which this VG resides
+ * @param[in] reason FSSYNC reason code
+ * @param[out] res SYNC response message
+ *
+ * @return operation status
+ * @retval SYNC_OK success
+ */
+afs_int32
+FSYNC_VGCAdd(char * partition,
+ VolumeId parent,
+ VolumeId child,
+ int reason,
+ SYNC_response *res)
+{
+ return _FSYNC_VGCUpdate(partition, parent, child, FSYNC_VG_ADD, reason, res);
+}
+
+/**
+ * Delete volume from volume group cache.
+ *
+ * @param[in] parent rw volume
+ * @param[in] child volume id to add
+ * @param[in] partition name of vice partition on which this VG resides
+ * @param[in] reason FSSYNC reason code
+ * @param[out] res SYNC response message
+ *
+ * @return operation status
+ * @retval SYNC_OK success
+ */
+afs_int32
+FSYNC_VGCDel(char * partition,
+ VolumeId parent,
+ VolumeId child,
+ int reason,
+ SYNC_response *res)
+{
+ return _FSYNC_VGCUpdate(partition, parent, child, FSYNC_VG_DEL, reason, res);
+}
+
+/**
+ * perform an asynchronous volume group scan.
+ *
+ * @param[in] partition vice partition string
+ * @param[in] reason FSSYNC reason code
+ *
+ * @note if partition is NULL, all vice partitions will be scanned.
+ *
+ * @return operation status
+ * @retval SYNC_OK success
+ */
+afs_int32
+FSYNC_VGCScan(char * partition, int reason)
+{
+ int command;
+
+ if (partition == NULL) {
+ command = FSYNC_VG_SCAN_ALL;
+ partition = "";
+ } else {
+ command = FSYNC_VG_SCAN;
+ }
+
+ return FSYNC_VolOp(0, partition, command, reason, NULL);
+}
#endif /* FSSYNC_BUILD_CLIENT */
git://git.openafs.org / openafs.git / blobdiff