/* vlclient.c: AFS Volume Location Service client
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/init.h>
#include <linux/sched.h>
#include <rxrpc/rxrpc.h>
#include <rxrpc/transport.h>
#include <rxrpc/connection.h>
#include <rxrpc/call.h>
#include "server.h"
#include "volume.h"
#include "vlclient.h"
#include "kafsasyncd.h"
#include "kafstimod.h"
#include "errors.h"
#include "internal.h"
#define VLGETENTRYBYID 503 /* AFS Get Cache Entry By ID operation ID */
#define VLGETENTRYBYNAME 504 /* AFS Get Cache Entry By Name operation ID */
#define VLPROBE 514 /* AFS Probe Volume Location Service operation ID */
static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call);
static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call);
/*****************************************************************************/
/*
* map afs VL abort codes to/from Linux error codes
* - called with call->lock held
*/
static void afs_rxvl_aemap(struct rxrpc_call *call)
{
int err;
_enter("{%u,%u,%d}",
call->app_err_state, call->app_abort_code, call->app_errno);
switch (call->app_err_state) {
case RXRPC_ESTATE_LOCAL_ABORT:
call->app_abort_code = -call->app_errno;
return;
case RXRPC_ESTATE_PEER_ABORT:
switch (call->app_abort_code) {
case AFSVL_IDEXIST: err = -EEXIST; break;
case AFSVL_IO: err = -EREMOTEIO; break;
case AFSVL_NAMEEXIST: err = -EEXIST; break;
case AFSVL_CREATEFAIL: err = -EREMOTEIO; break;
case AFSVL_NOENT: err = -ENOMEDIUM; break;
case AFSVL_EMPTY: err = -ENOMEDIUM; break;
case AFSVL_ENTDELETED: err = -ENOMEDIUM; break;
case AFSVL_BADNAME: err = -EINVAL; break;
case AFSVL_BADINDEX: err = -EINVAL; break;
case AFSVL_BADVOLTYPE: err = -EINVAL; break;
case AFSVL_BADSERVER: err = -EINVAL; break;
case AFSVL_BADPARTITION: err = -EINVAL; break;
case AFSVL_REPSFULL: err = -EFBIG; break;
case AFSVL_NOREPSERVER: err = -ENOENT; break;
case AFSVL_DUPREPSERVER: err = -EEXIST; break;
case AFSVL_RWNOTFOUND: err = -ENOENT; break;
case AFSVL_BADREFCOUNT: err = -EINVAL; break;
case AFSVL_SIZEEXCEEDED: err = -EINVAL; break;
case AFSVL_BADENTRY: err = -EINVAL; break;
case AFSVL_BADVOLIDBUMP: err = -EINVAL; break;
case AFSVL_IDALREADYHASHED: err = -EINVAL; break;
case AFSVL_ENTRYLOCKED: err = -EBUSY; break;
case AFSVL_BADVOLOPER: err = -EBADRQC; break;
case AFSVL_BADRELLOCKTYPE: err = -EINVAL; break;
case AFSVL_RERELEASE: err = -EREMOTEIO; break;
case AFSVL_BADSERVERFLAG: err = -EINVAL; break;
case AFSVL_PERM: err = -EACCES; break;
case AFSVL_NOMEM: err = -EREMOTEIO; break;
default:
err = afs_abort_to_error(call->app_abort_code);
break;
}
call->app_errno = err;
return;
default:
return;
}
} /* end afs_rxvl_aemap() */
#if 0
/*****************************************************************************/
/*
* probe a volume location server to see if it is still alive -- unused
*/
static int afs_rxvl_probe(struct afs_server *server, int alloc_flags)
{
struct rxrpc_connection *conn;
struct rxrpc_call *call;
struct kvec piov[1];
size_t sent;
int ret;
__be32 param[1];
DECLARE_WAITQUEUE(myself, current);
/* get hold of the vlserver connection */
ret = afs_server_get_vlconn(server, &conn);
if (ret < 0)
goto out;
/* create a call through that connection */
ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call);
if (ret < 0) {
printk("kAFS: Unable to create call: %d\n", ret);
goto out_put_conn;
}
call->app_opcode = VLPROBE;
/* we want to get event notifications from the call */
add_wait_queue(&call->waitq, &myself);
/* marshall the parameters */
param[0] = htonl(VLPROBE);
piov[0].iov_len = sizeof(param);
piov[0].iov_base = param;
/* send the parameters to the server */
ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET,
alloc_flags, 0, &sent);
if (ret < 0)
goto abort;
/* wait for the reply to completely arrive */
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (call->app_call_state != RXRPC_CSTATE_CLNT_RCV_REPLY ||
signal_pending(current))
break;
schedule();
}
set_current_state(TASK_RUNNING);
ret = -EINTR;
if (signal_pending(current))
goto abort;
switch (call->app_call_state) {
case RXRPC_CSTATE_ERROR:
ret = call->app_errno;
goto out_unwait;
case RXRPC_CSTATE_CLNT_GOT_REPLY:
ret = 0;
goto out_unwait;
default:
BUG();
}
abort:
set_current_state(TASK_UNINTERRUPTIBLE);
rxrpc_call_abort(call, ret);
schedule();
out_unwait:
set_current_state(TASK_RUNNING);
remove_wait_queue(&call->waitq, &myself);
rxrpc_put_call(call);
out_put_conn:
rxrpc_put_connection(conn);
out:
return ret;
} /* end afs_rxvl_probe() */
#endif
/*****************************************************************************/
/*
* look up a volume location database entry by name
*/
int afs_rxvl_get_entry_by_name(struct afs_server *server,
const char *volname,
unsigned volnamesz,
struct afs_cache_vlocation *entry)
{
DECLARE_WAITQUEUE(myself, current);
struct rxrpc_connection *conn;
struct rxrpc_call *call;
struct kvec piov[3];
unsigned tmp;
size_t sent;
int ret, loop;
__be32 *bp, param[2], zero;
_enter(",%*.*s,%u,", volnamesz, volnamesz, volname, volnamesz);
memset(entry, 0, sizeof(*entry));
/* get hold of the vlserver connection */
ret = afs_server_get_vlconn(server, &conn);
if (ret < 0)
goto out;
/* create a call through that connection */
ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call);
if (ret < 0) {
printk("kAFS: Unable to create call: %d\n", ret);
goto out_put_conn;
}
call->app_opcode = VLGETENTRYBYNAME;
/* we want to get event notifications from the call */
add_wait_queue(&call->waitq, &myself);
/* marshall the parameters */
piov[1].iov_len = volnamesz;
piov[1].iov_base = (char *) volname;
zero = 0;
piov[2].iov_len = (4 - (piov[1].iov_len & 3)) & 3;
piov[2].iov_base = &zero;
param[0] = htonl(VLGETENTRYBYNAME);
param[1] = htonl(piov[1].iov_len);
piov[0].iov_len = sizeof(param);
piov[0].iov_base = param;
/* send the parameters to the server */
ret = rxrpc_call_write_data(call, 3, piov, RXRPC_LAST_PACKET, GFP_NOFS,
0, &sent);
if (ret < 0)
goto abort;
/* wait for the reply to completely arrive */
bp = rxrpc_call_alloc_scratch(call, 384);
ret = rxrpc_call_read_data(call, bp, 384,
RXRPC_CALL_READ_BLOCK |
RXRPC_CALL_READ_ALL);
if (ret < 0) {
if (ret == -ECONNABORTED) {
ret = call->app_errno;
goto out_unwait;
}
goto abort;
}
/* unmarshall the reply */
for (loop = 0; loop < 64; loop++)
entry->name[loop] = ntohl(*bp++);
bp++; /* final NUL */
bp++; /* type */
entry->nservers = ntohl(*bp++);
for (loop = 0; loop < 8; loop++)
entry->servers[loop].s_addr = *bp++;
bp += 8; /* partition IDs */
for (loop = 0; loop < 8; loop++) {
tmp = ntohl(*bp++);
if (tmp & AFS_VLSF_RWVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLSF_ROVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_RO;
if (tmp & AFS_VLSF_BACKVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_BAK;
}
entry->vid[0] = ntohl(*bp++);
entry->vid[1] = ntohl(*bp++);
entry->vid[2] = ntohl(*bp++);
bp++; /* clone ID */
tmp = ntohl(*bp++); /* flags */
if (tmp & AFS_VLF_RWEXISTS)
entry->vidmask |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLF_ROEXISTS)
entry->vidmask |= AFS_VOL_VTM_RO;
if (tmp & AFS_VLF_BACKEXISTS)
entry->vidmask |= AFS_VOL_VTM_BAK;
ret = -ENOMEDIUM;
if (!entry->vidmask)
goto abort;
/* success */
entry->rtime = get_seconds();
ret = 0;
out_unwait:
set_current_state(TASK_RUNNING);
remove_wait_queue(&call->waitq, &myself);
rxrpc_put_call(call);
out_put_conn:
rxrpc_put_connection(conn);
out:
_leave(" = %d", ret);
return ret;
abort:
set_current_state(TASK_UNINTERRUPTIBLE);
rxrpc_call_abort(call, ret);
schedule();
goto out_unwait;
} /* end afs_rxvl_get_entry_by_name() */
/*****************************************************************************/
/*
* look up a volume location database entry by ID
*/
int afs_rxvl_get_entry_by_id(struct afs_server *server,
afs_volid_t volid,
afs_voltype_t voltype,
struct afs_cache_vlocation *entry)
{
DECLARE_WAITQUEUE(myself, current);
struct rxrpc_connection *conn;
struct rxrpc_call *call;
struct kvec piov[1];
unsigned tmp;
size_t sent;
int ret, loop;
__be32 *bp, param[3];
_enter(",%x,%d,", volid, voltype);
memset(entry, 0, sizeof(*entry));
/* get hold of the vlserver connection */
ret = afs_server_get_vlconn(server, &conn);
if (ret < 0)
goto out;
/* create a call through that connection */
ret = rxrpc_create_call(conn, NULL, NULL, afs_rxvl_aemap, &call);
if (ret < 0) {
printk("kAFS: Unable to create call: %d\n", ret);
goto out_put_conn;
}
call->app_opcode = VLGETENTRYBYID;
/* we want to get event notifications from the call */
add_wait_queue(&call->waitq, &myself);
/* marshall the parameters */
param[0] = htonl(VLGETENTRYBYID);
param[1] = htonl(volid);
param[2] = htonl(voltype);
piov[0].iov_len = sizeof(param);
piov[0].iov_base = param;
/* send the parameters to the server */
ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
0, &sent);
if (ret < 0)
goto abort;
/* wait for the reply to completely arrive */
bp = rxrpc_call_alloc_scratch(call, 384);
ret = rxrpc_call_read_data(call, bp, 384,
RXRPC_CALL_READ_BLOCK |
RXRPC_CALL_READ_ALL);
if (ret < 0) {
if (ret == -ECONNABORTED) {
ret = call->app_errno;
goto out_unwait;
}
goto abort;
}
/* unmarshall the reply */
for (loop = 0; loop < 64; loop++)
entry->name[loop] = ntohl(*bp++);
bp++; /* final NUL */
bp++; /* type */
entry->nservers = ntohl(*bp++);
for (loop = 0; loop < 8; loop++)
entry->servers[loop].s_addr = *bp++;
bp += 8; /* partition IDs */
for (loop = 0; loop < 8; loop++) {
tmp = ntohl(*bp++);
if (tmp & AFS_VLSF_RWVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLSF_ROVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_RO;
if (tmp & AFS_VLSF_BACKVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_BAK;
}
entry->vid[0] = ntohl(*bp++);
entry->vid[1] = ntohl(*bp++);
entry->vid[2] = ntohl(*bp++);
bp++; /* clone ID */
tmp = ntohl(*bp++); /* flags */
if (tmp & AFS_VLF_RWEXISTS)
entry->vidmask |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLF_ROEXISTS)
entry->vidmask |= AFS_VOL_VTM_RO;
if (tmp & AFS_VLF_BACKEXISTS)
entry->vidmask |= AFS_VOL_VTM_BAK;
ret = -ENOMEDIUM;
if (!entry->vidmask)
goto abort;
#if 0 /* TODO: remove */
entry->nservers = 3;
entry->servers[0].s_addr = htonl(0xac101249);
entry->servers[1].s_addr = htonl(0xac101243);
entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/);
entry->srvtmask[0] = AFS_VOL_VTM_RO;
entry->srvtmask[1] = AFS_VOL_VTM_RO;
entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW;
#endif
/* success */
entry->rtime = get_seconds();
ret = 0;
out_unwait:
set_current_state(TASK_RUNNING);
remove_wait_queue(&call->waitq, &myself);
rxrpc_put_call(call);
out_put_conn:
rxrpc_put_connection(conn);
out:
_leave(" = %d", ret);
return ret;
abort:
set_current_state(TASK_UNINTERRUPTIBLE);
rxrpc_call_abort(call, ret);
schedule();
goto out_unwait;
} /* end afs_rxvl_get_entry_by_id() */
/*****************************************************************************/
/*
* look up a volume location database entry by ID asynchronously
*/
int afs_rxvl_get_entry_by_id_async(struct afs_async_op *op,
afs_volid_t volid,
afs_voltype_t voltype)
{
struct rxrpc_connection *conn;
struct rxrpc_call *call;
struct kvec piov[1];
size_t sent;
int ret;
__be32 param[3];
_enter(",%x,%d,", volid, voltype);
/* get hold of the vlserver connection */
ret = afs_server_get_vlconn(op->server, &conn);
if (ret < 0) {
_leave(" = %d", ret);
return ret;
}
/* create a call through that connection */
ret = rxrpc_create_call(conn,
afs_rxvl_get_entry_by_id_attn,
afs_rxvl_get_entry_by_id_error,
afs_rxvl_aemap,
&op->call);
rxrpc_put_connection(conn);
if (ret < 0) {
printk("kAFS: Unable to create call: %d\n", ret);
_leave(" = %d", ret);
return ret;
}
op->call->app_opcode = VLGETENTRYBYID;
op->call->app_user = op;
call = op->call;
rxrpc_get_call(call);
/* send event notifications from the call to kafsasyncd */
afs_kafsasyncd_begin_op(op);
/* marshall the parameters */
param[0] = htonl(VLGETENTRYBYID);
param[1] = htonl(volid);
param[2] = htonl(voltype);
piov[0].iov_len = sizeof(param);
piov[0].iov_base = param;
/* allocate result read buffer in scratch space */
call->app_scr_ptr = rxrpc_call_alloc_scratch(op->call, 384);
/* send the parameters to the server */
ret = rxrpc_call_write_data(call, 1, piov, RXRPC_LAST_PACKET, GFP_NOFS,
0, &sent);
if (ret < 0) {
rxrpc_call_abort(call, ret); /* handle from kafsasyncd */
ret = 0;
goto out;
}
/* wait for the reply to completely arrive */
ret = rxrpc_call_read_data(call, call->app_scr_ptr, 384, 0);
switch (ret) {
case 0:
case -EAGAIN:
case -ECONNABORTED:
ret = 0;
break; /* all handled by kafsasyncd */
default:
rxrpc_call_abort(call, ret); /* make kafsasyncd handle it */
ret = 0;
break;
}
out:
rxrpc_put_call(call);
_leave(" = %d", ret);
return ret;
} /* end afs_rxvl_get_entry_by_id_async() */
/*****************************************************************************/
/*
* attend to the asynchronous get VLDB entry by ID
*/
int afs_rxvl_get_entry_by_id_async2(struct afs_async_op *op,
struct afs_cache_vlocation *entry)
{
__be32 *bp;
__u32 tmp;
int loop, ret;
_enter("{op=%p cst=%u}", op, op->call->app_call_state);
memset(entry, 0, sizeof(*entry));
if (op->call->app_call_state == RXRPC_CSTATE_COMPLETE) {
/* operation finished */
afs_kafsasyncd_terminate_op(op);
bp = op->call->app_scr_ptr;
/* unmarshall the reply */
for (loop = 0; loop < 64; loop++)
entry->name[loop] = ntohl(*bp++);
bp++; /* final NUL */
bp++; /* type */
entry->nservers = ntohl(*bp++);
for (loop = 0; loop < 8; loop++)
entry->servers[loop].s_addr = *bp++;
bp += 8; /* partition IDs */
for (loop = 0; loop < 8; loop++) {
tmp = ntohl(*bp++);
if (tmp & AFS_VLSF_RWVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLSF_ROVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_RO;
if (tmp & AFS_VLSF_BACKVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_BAK;
}
entry->vid[0] = ntohl(*bp++);
entry->vid[1] = ntohl(*bp++);
entry->vid[2] = ntohl(*bp++);
bp++; /* clone ID */
tmp = ntohl(*bp++); /* flags */
if (tmp & AFS_VLF_RWEXISTS)
entry->vidmask |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLF_ROEXISTS)
entry->vidmask |= AFS_VOL_VTM_RO;
if (tmp & AFS_VLF_BACKEXISTS)
entry->vidmask |= AFS_VOL_VTM_BAK;
ret = -ENOMEDIUM;
if (!entry->vidmask) {
rxrpc_call_abort(op->call, ret);
goto done;
}
#if 0 /* TODO: remove */
entry->nservers = 3;
entry->servers[0].s_addr = htonl(0xac101249);
entry->servers[1].s_addr = htonl(0xac101243);
entry->servers[2].s_addr = htonl(0xac10125b /*0xac10125b*/);
entry->srvtmask[0] = AFS_VOL_VTM_RO;
entry->srvtmask[1] = AFS_VOL_VTM_RO;
entry->srvtmask[2] = AFS_VOL_VTM_RO | AFS_VOL_VTM_RW;
#endif
/* success */
entry->rtime = get_seconds();
ret = 0;
goto done;
}
if (op->call->app_call_state == RXRPC_CSTATE_ERROR) {
/* operation error */
ret = op->call->app_errno;
goto done;
}
_leave(" = -EAGAIN");
return -EAGAIN;
done:
rxrpc_put_call(op->call);
op->call = NULL;
_leave(" = %d", ret);
return ret;
} /* end afs_rxvl_get_entry_by_id_async2() */
/*****************************************************************************/
/*
* handle attention events on an async get-entry-by-ID op
* - called from krxiod
*/
static void afs_rxvl_get_entry_by_id_attn(struct rxrpc_call *call)
{
struct afs_async_op *op = call->app_user;
_enter("{op=%p cst=%u}", op, call->app_call_state);
switch (call->app_call_state) {
case RXRPC_CSTATE_COMPLETE:
afs_kafsasyncd_attend_op(op);
break;
case RXRPC_CSTATE_CLNT_RCV_REPLY:
if (call->app_async_read)
break;
case RXRPC_CSTATE_CLNT_GOT_REPLY:
if (call->app_read_count == 0)
break;
printk("kAFS: Reply bigger than expected"
" {cst=%u asyn=%d mark=%Zu rdy=%Zu pr=%u%s}",
call->app_call_state,
call->app_async_read,
call->app_mark,
call->app_ready_qty,
call->pkt_rcv_count,
call->app_last_rcv ? " last" : "");
rxrpc_call_abort(call, -EBADMSG);
break;
default:
BUG();
}
_leave("");
} /* end afs_rxvl_get_entry_by_id_attn() */
/*****************************************************************************/
/*
* handle error events on an async get-entry-by-ID op
* - called from krxiod
*/
static void afs_rxvl_get_entry_by_id_error(struct rxrpc_call *call)
{
struct afs_async_op *op = call->app_user;
_enter("{op=%p cst=%u}", op, call->app_call_state);
afs_kafsasyncd_attend_op(op);
_leave("");
} /* end afs_rxvl_get_entry_by_id_error() */
