[mirror_ubuntu-artful-kernel.git] / fs / afs / 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 "internal.h"

/*
 * map volume locator abort codes to error codes
 */
static int afs_vl_abort_to_error(u32 abort_code)
{
	_enter("%u", abort_code);

	switch (abort_code) {
	case AFSVL_IDEXIST:		return -EEXIST;
	case AFSVL_IO:			return -EREMOTEIO;
	case AFSVL_NAMEEXIST:		return -EEXIST;
	case AFSVL_CREATEFAIL:		return -EREMOTEIO;
	case AFSVL_NOENT:		return -ENOMEDIUM;
	case AFSVL_EMPTY:		return -ENOMEDIUM;
	case AFSVL_ENTDELETED:		return -ENOMEDIUM;
	case AFSVL_BADNAME:		return -EINVAL;
	case AFSVL_BADINDEX:		return -EINVAL;
	case AFSVL_BADVOLTYPE:		return -EINVAL;
	case AFSVL_BADSERVER:		return -EINVAL;
	case AFSVL_BADPARTITION:	return -EINVAL;
	case AFSVL_REPSFULL:		return -EFBIG;
	case AFSVL_NOREPSERVER:		return -ENOENT;
	case AFSVL_DUPREPSERVER:	return -EEXIST;
	case AFSVL_RWNOTFOUND:		return -ENOENT;
	case AFSVL_BADREFCOUNT:		return -EINVAL;
	case AFSVL_SIZEEXCEEDED:	return -EINVAL;
	case AFSVL_BADENTRY:		return -EINVAL;
	case AFSVL_BADVOLIDBUMP:	return -EINVAL;
	case AFSVL_IDALREADYHASHED:	return -EINVAL;
	case AFSVL_ENTRYLOCKED:		return -EBUSY;
	case AFSVL_BADVOLOPER:		return -EBADRQC;
	case AFSVL_BADRELLOCKTYPE:	return -EINVAL;
	case AFSVL_RERELEASE:		return -EREMOTEIO;
	case AFSVL_BADSERVERFLAG:	return -EINVAL;
	case AFSVL_PERM:		return -EACCES;
	case AFSVL_NOMEM:		return -EREMOTEIO;
	default:
		return afs_abort_to_error(abort_code);
	}
}

/*
 * deliver reply data to a VL.GetEntryByXXX call
 */
static int afs_deliver_vl_get_entry_by_xxx(struct afs_call *call,
					   struct sk_buff *skb, bool last)
{
	struct afs_cache_vlocation *entry;
	__be32 *bp;
	u32 tmp;
	int loop;

	_enter(",,%u", last);

	afs_transfer_reply(call, skb);
	if (!last)
		return 0;

	if (call->reply_size != call->reply_max)
		return -EBADMSG;

	/* unmarshall the reply once we've received all of it */
	entry = call->reply;
	bp = call->buffer;

	for (loop = 0; loop < 64; loop++)
		entry->name[loop] = ntohl(*bp++);
	entry->name[loop] = 0;
	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++);
		entry->srvtmask[loop] = 0;
		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 */
	entry->vidmask = 0;
	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;
	if (!entry->vidmask)
		return -EBADMSG;

	_leave(" = 0 [done]");
	return 0;
}

/*
 * VL.GetEntryByName operation type
 */
static const struct afs_call_type afs_RXVLGetEntryByName = {
	.name		= "VL.GetEntryByName",
	.deliver	= afs_deliver_vl_get_entry_by_xxx,
	.abort_to_error	= afs_vl_abort_to_error,
	.destructor	= afs_flat_call_destructor,
};

/*
 * VL.GetEntryById operation type
 */
static const struct afs_call_type afs_RXVLGetEntryById = {
	.name		= "VL.GetEntryById",
	.deliver	= afs_deliver_vl_get_entry_by_xxx,
	.abort_to_error	= afs_vl_abort_to_error,
	.destructor	= afs_flat_call_destructor,
};

/*
 * dispatch a get volume entry by name operation
 */
int afs_vl_get_entry_by_name(struct in_addr *addr,
			     struct key *key,
			     const char *volname,
			     struct afs_cache_vlocation *entry,
			     const struct afs_wait_mode *wait_mode)
{
	struct afs_call *call;
	size_t volnamesz, reqsz, padsz;
	__be32 *bp;

	_enter("");

	volnamesz = strlen(volname);
	padsz = (4 - (volnamesz & 3)) & 3;
	reqsz = 8 + volnamesz + padsz;

	call = afs_alloc_flat_call(&afs_RXVLGetEntryByName, reqsz, 384);
	if (!call)
		return -ENOMEM;

	call->key = key;
	call->reply = entry;
	call->service_id = VL_SERVICE;
	call->port = htons(AFS_VL_PORT);

	/* marshall the parameters */
	bp = call->request;
	*bp++ = htonl(VLGETENTRYBYNAME);
	*bp++ = htonl(volnamesz);
	memcpy(bp, volname, volnamesz);
	if (padsz > 0)
		memset((void *) bp + volnamesz, 0, padsz);

	/* initiate the call */
	return afs_make_call(addr, call, GFP_KERNEL, wait_mode);
}

/*
 * dispatch a get volume entry by ID operation
 */
int afs_vl_get_entry_by_id(struct in_addr *addr,
			   struct key *key,
			   afs_volid_t volid,
			   afs_voltype_t voltype,
			   struct afs_cache_vlocation *entry,
			   const struct afs_wait_mode *wait_mode)
{
	struct afs_call *call;
	__be32 *bp;

	_enter("");

	call = afs_alloc_flat_call(&afs_RXVLGetEntryById, 12, 384);
	if (!call)
		return -ENOMEM;

	call->key = key;
	call->reply = entry;
	call->service_id = VL_SERVICE;
	call->port = htons(AFS_VL_PORT);

	/* marshall the parameters */
	bp = call->request;
	*bp++ = htonl(VLGETENTRYBYID);
	*bp++ = htonl(volid);
	*bp   = htonl(voltype);

	/* initiate the call */
	return afs_make_call(addr, call, GFP_KERNEL, wait_mode);
}
Commit	Line	Data
ec26815a	1	/* AFS Volume Location Service client
1da177e4 LT	2	*
	3	* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
	4	* Written by David Howells (dhowells@redhat.com)
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
	12	#include <linux/init.h>
	13	#include <linux/sched.h>
1da177e4 LT	14	#include "internal.h"
1da177e4 LT	15
1da177e4	16	/*
08e0e7c8	17	* map volume locator abort codes to error codes
1da177e4	18	*/
08e0e7c8	19	static int afs_vl_abort_to_error(u32 abort_code)
1da177e4	20	{
08e0e7c8 DH	21	_enter("%u", abort_code);
	22
	23	switch (abort_code) {
	24	case AFSVL_IDEXIST: return -EEXIST;
	25	case AFSVL_IO: return -EREMOTEIO;
	26	case AFSVL_NAMEEXIST: return -EEXIST;
	27	case AFSVL_CREATEFAIL: return -EREMOTEIO;
	28	case AFSVL_NOENT: return -ENOMEDIUM;
	29	case AFSVL_EMPTY: return -ENOMEDIUM;
	30	case AFSVL_ENTDELETED: return -ENOMEDIUM;
	31	case AFSVL_BADNAME: return -EINVAL;
	32	case AFSVL_BADINDEX: return -EINVAL;
	33	case AFSVL_BADVOLTYPE: return -EINVAL;
	34	case AFSVL_BADSERVER: return -EINVAL;
	35	case AFSVL_BADPARTITION: return -EINVAL;
	36	case AFSVL_REPSFULL: return -EFBIG;
	37	case AFSVL_NOREPSERVER: return -ENOENT;
	38	case AFSVL_DUPREPSERVER: return -EEXIST;
	39	case AFSVL_RWNOTFOUND: return -ENOENT;
	40	case AFSVL_BADREFCOUNT: return -EINVAL;
	41	case AFSVL_SIZEEXCEEDED: return -EINVAL;
	42	case AFSVL_BADENTRY: return -EINVAL;
	43	case AFSVL_BADVOLIDBUMP: return -EINVAL;
	44	case AFSVL_IDALREADYHASHED: return -EINVAL;
	45	case AFSVL_ENTRYLOCKED: return -EBUSY;
	46	case AFSVL_BADVOLOPER: return -EBADRQC;
	47	case AFSVL_BADRELLOCKTYPE: return -EINVAL;
	48	case AFSVL_RERELEASE: return -EREMOTEIO;
	49	case AFSVL_BADSERVERFLAG: return -EINVAL;
	50	case AFSVL_PERM: return -EACCES;
	51	case AFSVL_NOMEM: return -EREMOTEIO;
1da177e4	52	default:
08e0e7c8	53	return afs_abort_to_error(abort_code);
1da177e4	54	}
ec26815a	55	}
1da177e4	56
1da177e4	57	/*
08e0e7c8	58	* deliver reply data to a VL.GetEntryByXXX call
1da177e4	59	*/
08e0e7c8 DH	60	static int afs_deliver_vl_get_entry_by_xxx(struct afs_call *call,
08e0e7c8 DH	61	struct sk_buff *skb, bool last)
1da177e4	62	{
08e0e7c8 DH	63	struct afs_cache_vlocation *entry;
	64	__be32 *bp;
	65	u32 tmp;
	66	int loop;
1da177e4	67
08e0e7c8	68	_enter(",,%u", last);
1da177e4	69
08e0e7c8 DH	70	afs_transfer_reply(call, skb);
	71	if (!last)
	72	return 0;
1da177e4	73
08e0e7c8 DH	74	if (call->reply_size != call->reply_max)
08e0e7c8 DH	75	return -EBADMSG;
1da177e4	76
08e0e7c8 DH	77	/* unmarshall the reply once we've received all of it */
	78	entry = call->reply;
	79	bp = call->buffer;
1da177e4	80
1da177e4 LT	81	for (loop = 0; loop < 64; loop++)
1da177e4 LT	82	entry->name[loop] = ntohl(*bp++);
08e0e7c8	83	entry->name[loop] = 0;
1da177e4 LT	84	bp++; /* final NUL */
	85
	86	bp++; /* type */
	87	entry->nservers = ntohl(*bp++);
	88
	89	for (loop = 0; loop < 8; loop++)
	90	entry->servers[loop].s_addr = *bp++;
	91
	92	bp += 8; /* partition IDs */
	93
	94	for (loop = 0; loop < 8; loop++) {
	95	tmp = ntohl(*bp++);
08e0e7c8	96	entry->srvtmask[loop] = 0;
1da177e4 LT	97	if (tmp & AFS_VLSF_RWVOL)
	98	entry->srvtmask[loop] \|= AFS_VOL_VTM_RW;
	99	if (tmp & AFS_VLSF_ROVOL)
	100	entry->srvtmask[loop] \|= AFS_VOL_VTM_RO;
	101	if (tmp & AFS_VLSF_BACKVOL)
	102	entry->srvtmask[loop] \|= AFS_VOL_VTM_BAK;
	103	}
	104
	105	entry->vid[0] = ntohl(*bp++);
	106	entry->vid[1] = ntohl(*bp++);
	107	entry->vid[2] = ntohl(*bp++);
	108
	109	bp++; /* clone ID */
	110
	111	tmp = ntohl(bp++); / flags */
08e0e7c8	112	entry->vidmask = 0;
1da177e4 LT	113	if (tmp & AFS_VLF_RWEXISTS)
	114	entry->vidmask \|= AFS_VOL_VTM_RW;
	115	if (tmp & AFS_VLF_ROEXISTS)
	116	entry->vidmask \|= AFS_VOL_VTM_RO;
	117	if (tmp & AFS_VLF_BACKEXISTS)
	118	entry->vidmask \|= AFS_VOL_VTM_BAK;
1da177e4	119	if (!entry->vidmask)
08e0e7c8 DH	120	return -EBADMSG;
	121
	122	_leave(" = 0 [done]");
	123	return 0;
ec26815a	124	}
1da177e4	125
1da177e4	126	/*
08e0e7c8	127	* VL.GetEntryByName operation type
1da177e4	128	*/
08e0e7c8	129	static const struct afs_call_type afs_RXVLGetEntryByName = {
00d3b7a4	130	.name = "VL.GetEntryByName",
08e0e7c8 DH	131	.deliver = afs_deliver_vl_get_entry_by_xxx,
	132	.abort_to_error = afs_vl_abort_to_error,
	133	.destructor = afs_flat_call_destructor,
	134	};
1da177e4	135
08e0e7c8 DH	136	/*
	137	* VL.GetEntryById operation type
	138	*/
	139	static const struct afs_call_type afs_RXVLGetEntryById = {
00d3b7a4	140	.name = "VL.GetEntryById",
08e0e7c8 DH	141	.deliver = afs_deliver_vl_get_entry_by_xxx,
	142	.abort_to_error = afs_vl_abort_to_error,
	143	.destructor = afs_flat_call_destructor,
	144	};
1da177e4	145
1da177e4	146	/*
08e0e7c8	147	* dispatch a get volume entry by name operation
1da177e4	148	*/
08e0e7c8	149	int afs_vl_get_entry_by_name(struct in_addr *addr,
00d3b7a4	150	struct key *key,
08e0e7c8 DH	151	const char *volname,
	152	struct afs_cache_vlocation *entry,
	153	const struct afs_wait_mode *wait_mode)
1da177e4	154	{
08e0e7c8 DH	155	struct afs_call *call;
	156	size_t volnamesz, reqsz, padsz;
	157	__be32 *bp;
1da177e4	158
08e0e7c8	159	_enter("");
1da177e4	160
08e0e7c8 DH	161	volnamesz = strlen(volname);
	162	padsz = (4 - (volnamesz & 3)) & 3;
	163	reqsz = 8 + volnamesz + padsz;
1da177e4	164
08e0e7c8 DH	165	call = afs_alloc_flat_call(&afs_RXVLGetEntryByName, reqsz, 384);
	166	if (!call)
	167	return -ENOMEM;
1da177e4	168
00d3b7a4	169	call->key = key;
08e0e7c8 DH	170	call->reply = entry;
	171	call->service_id = VL_SERVICE;
	172	call->port = htons(AFS_VL_PORT);
1da177e4 LT	173
1da177e4 LT	174	/* marshall the parameters */
08e0e7c8 DH	175	bp = call->request;
	176	*bp++ = htonl(VLGETENTRYBYNAME);
	177	*bp++ = htonl(volnamesz);
	178	memcpy(bp, volname, volnamesz);
	179	if (padsz > 0)
	180	memset((void *) bp + volnamesz, 0, padsz);
	181
	182	/* initiate the call */
	183	return afs_make_call(addr, call, GFP_KERNEL, wait_mode);
ec26815a	184	}
1da177e4	185
1da177e4	186	/*
08e0e7c8	187	* dispatch a get volume entry by ID operation
1da177e4	188	*/
08e0e7c8	189	int afs_vl_get_entry_by_id(struct in_addr *addr,
00d3b7a4	190	struct key *key,
08e0e7c8 DH	191	afs_volid_t volid,
	192	afs_voltype_t voltype,
	193	struct afs_cache_vlocation *entry,
	194	const struct afs_wait_mode *wait_mode)
1da177e4	195	{
08e0e7c8	196	struct afs_call *call;
1da177e4	197	__be32 *bp;
1da177e4	198
08e0e7c8	199	_enter("");
1da177e4	200
08e0e7c8 DH	201	call = afs_alloc_flat_call(&afs_RXVLGetEntryById, 12, 384);
	202	if (!call)
	203	return -ENOMEM;
1da177e4	204
00d3b7a4	205	call->key = key;
08e0e7c8 DH	206	call->reply = entry;
	207	call->service_id = VL_SERVICE;
	208	call->port = htons(AFS_VL_PORT);
1da177e4	209
08e0e7c8 DH	210	/* marshall the parameters */
	211	bp = call->request;
	212	*bp++ = htonl(VLGETENTRYBYID);
	213	*bp++ = htonl(volid);
	214	*bp = htonl(voltype);
1da177e4	215
08e0e7c8 DH	216	/* initiate the call */
08e0e7c8 DH	217	return afs_make_call(addr, call, GFP_KERNEL, wait_mode);
ec26815a	218	}