[linux-2.6-block.git] / fs / nfsd / blocklayoutxdr.c

/*
 * Copyright (c) 2014-2016 Christoph Hellwig.
 */
#include <linux/sunrpc/svc.h>
#include <linux/exportfs.h>
#include <linux/nfs4.h>

#include "nfsd.h"
#include "blocklayoutxdr.h"

#define NFSDDBG_FACILITY	NFSDDBG_PNFS


__be32
nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
		struct nfsd4_layoutget *lgp)
{
	struct pnfs_block_extent *b = lgp->lg_content;
	int len = sizeof(__be32) + 5 * sizeof(__be64) + sizeof(__be32);
	__be32 *p;

	p = xdr_reserve_space(xdr, sizeof(__be32) + len);
	if (!p)
		return nfserr_toosmall;

	*p++ = cpu_to_be32(len);
	*p++ = cpu_to_be32(1);		/* we always return a single extent */

	p = xdr_encode_opaque_fixed(p, &b->vol_id,
			sizeof(struct nfsd4_deviceid));
	p = xdr_encode_hyper(p, b->foff);
	p = xdr_encode_hyper(p, b->len);
	p = xdr_encode_hyper(p, b->soff);
	*p++ = cpu_to_be32(b->es);
	return 0;
}

static int
nfsd4_block_encode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b)
{
	__be32 *p;
	int len;

	switch (b->type) {
	case PNFS_BLOCK_VOLUME_SIMPLE:
		len = 4 + 4 + 8 + 4 + b->simple.sig_len;
		p = xdr_reserve_space(xdr, len);
		if (!p)
			return -ETOOSMALL;

		*p++ = cpu_to_be32(b->type);
		*p++ = cpu_to_be32(1);	/* single signature */
		p = xdr_encode_hyper(p, b->simple.offset);
		p = xdr_encode_opaque(p, b->simple.sig, b->simple.sig_len);
		break;
	case PNFS_BLOCK_VOLUME_SCSI:
		len = 4 + 4 + 4 + 4 + b->scsi.designator_len + 8;
		p = xdr_reserve_space(xdr, len);
		if (!p)
			return -ETOOSMALL;

		*p++ = cpu_to_be32(b->type);
		*p++ = cpu_to_be32(b->scsi.code_set);
		*p++ = cpu_to_be32(b->scsi.designator_type);
		p = xdr_encode_opaque(p, b->scsi.designator, b->scsi.designator_len);
		p = xdr_encode_hyper(p, b->scsi.pr_key);
		break;
	default:
		return -ENOTSUPP;
	}

	return len;
}

__be32
nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
		struct nfsd4_getdeviceinfo *gdp)
{
	struct pnfs_block_deviceaddr *dev = gdp->gd_device;
	int len = sizeof(__be32), ret, i;
	__be32 *p;

	p = xdr_reserve_space(xdr, len + sizeof(__be32));
	if (!p)
		return nfserr_resource;

	for (i = 0; i < dev->nr_volumes; i++) {
		ret = nfsd4_block_encode_volume(xdr, &dev->volumes[i]);
		if (ret < 0)
			return nfserrno(ret);
		len += ret;
	}

	/*
	 * Fill in the overall length and number of volumes at the beginning
	 * of the layout.
	 */
	*p++ = cpu_to_be32(len);
	*p++ = cpu_to_be32(dev->nr_volumes);
	return 0;
}

int
nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
		u32 block_size)
{
	struct iomap *iomaps;
	u32 nr_iomaps, i;

	if (len < sizeof(u32)) {
		dprintk("%s: extent array too small: %u\n", __func__, len);
		return -EINVAL;
	}
	len -= sizeof(u32);
	if (len % PNFS_BLOCK_EXTENT_SIZE) {
		dprintk("%s: extent array invalid: %u\n", __func__, len);
		return -EINVAL;
	}

	nr_iomaps = be32_to_cpup(p++);
	if (nr_iomaps != len / PNFS_BLOCK_EXTENT_SIZE) {
		dprintk("%s: extent array size mismatch: %u/%u\n",
			__func__, len, nr_iomaps);
		return -EINVAL;
	}

	iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL);
	if (!iomaps) {
		dprintk("%s: failed to allocate extent array\n", __func__);
		return -ENOMEM;
	}

	for (i = 0; i < nr_iomaps; i++) {
		struct pnfs_block_extent bex;

		memcpy(&bex.vol_id, p, sizeof(struct nfsd4_deviceid));
		p += XDR_QUADLEN(sizeof(struct nfsd4_deviceid));

		p = xdr_decode_hyper(p, &bex.foff);
		if (bex.foff & (block_size - 1)) {
			dprintk("%s: unaligned offset 0x%llx\n",
				__func__, bex.foff);
			goto fail;
		}
		p = xdr_decode_hyper(p, &bex.len);
		if (bex.len & (block_size - 1)) {
			dprintk("%s: unaligned length 0x%llx\n",
				__func__, bex.foff);
			goto fail;
		}
		p = xdr_decode_hyper(p, &bex.soff);
		if (bex.soff & (block_size - 1)) {
			dprintk("%s: unaligned disk offset 0x%llx\n",
				__func__, bex.soff);
			goto fail;
		}
		bex.es = be32_to_cpup(p++);
		if (bex.es != PNFS_BLOCK_READWRITE_DATA) {
			dprintk("%s: incorrect extent state %d\n",
				__func__, bex.es);
			goto fail;
		}

		iomaps[i].offset = bex.foff;
		iomaps[i].length = bex.len;
	}

	*iomapp = iomaps;
	return nr_iomaps;
fail:
	kfree(iomaps);
	return -EINVAL;
}

int
nfsd4_scsi_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
		u32 block_size)
{
	struct iomap *iomaps;
	u32 nr_iomaps, expected, i;

	if (len < sizeof(u32)) {
		dprintk("%s: extent array too small: %u\n", __func__, len);
		return -EINVAL;
	}

	nr_iomaps = be32_to_cpup(p++);
	expected = sizeof(__be32) + nr_iomaps * PNFS_SCSI_RANGE_SIZE;
	if (len != expected) {
		dprintk("%s: extent array size mismatch: %u/%u\n",
			__func__, len, expected);
		return -EINVAL;
	}

	iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL);
	if (!iomaps) {
		dprintk("%s: failed to allocate extent array\n", __func__);
		return -ENOMEM;
	}

	for (i = 0; i < nr_iomaps; i++) {
		u64 val;

		p = xdr_decode_hyper(p, &val);
		if (val & (block_size - 1)) {
			dprintk("%s: unaligned offset 0x%llx\n", __func__, val);
			goto fail;
		}
		iomaps[i].offset = val;

		p = xdr_decode_hyper(p, &val);
		if (val & (block_size - 1)) {
			dprintk("%s: unaligned length 0x%llx\n", __func__, val);
			goto fail;
		}
		iomaps[i].length = val;
	}

	*iomapp = iomaps;
	return nr_iomaps;
fail:
	kfree(iomaps);
	return -EINVAL;
}
Commit	Line	Data
8650b8a0	1	/*
f99d4fbd	2	* Copyright (c) 2014-2016 Christoph Hellwig.
8650b8a0 CH	3	*/
	4	#include <linux/sunrpc/svc.h>
	5	#include <linux/exportfs.h>
	6	#include <linux/nfs4.h>
	7
	8	#include "nfsd.h"
	9	#include "blocklayoutxdr.h"
	10
	11	#define NFSDDBG_FACILITY NFSDDBG_PNFS
	12
	13
	14	__be32
	15	nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
	16	struct nfsd4_layoutget *lgp)
	17	{
	18	struct pnfs_block_extent *b = lgp->lg_content;
	19	int len = sizeof(__be32) + 5 * sizeof(__be64) + sizeof(__be32);
	20	__be32 *p;
	21
	22	p = xdr_reserve_space(xdr, sizeof(__be32) + len);
	23	if (!p)
	24	return nfserr_toosmall;
	25
	26	*p++ = cpu_to_be32(len);
	27	p++ = cpu_to_be32(1); / we always return a single extent */
	28
	29	p = xdr_encode_opaque_fixed(p, &b->vol_id,
	30	sizeof(struct nfsd4_deviceid));
	31	p = xdr_encode_hyper(p, b->foff);
	32	p = xdr_encode_hyper(p, b->len);
	33	p = xdr_encode_hyper(p, b->soff);
	34	*p++ = cpu_to_be32(b->es);
	35	return 0;
	36	}
	37
	38	static int
	39	nfsd4_block_encode_volume(struct xdr_stream xdr, struct pnfs_block_volume b)
	40	{
	41	__be32 *p;
	42	int len;
	43
	44	switch (b->type) {
	45	case PNFS_BLOCK_VOLUME_SIMPLE:
	46	len = 4 + 4 + 8 + 4 + b->simple.sig_len;
	47	p = xdr_reserve_space(xdr, len);
	48	if (!p)
	49	return -ETOOSMALL;
	50
	51	*p++ = cpu_to_be32(b->type);
	52	p++ = cpu_to_be32(1); / single signature */
	53	p = xdr_encode_hyper(p, b->simple.offset);
	54	p = xdr_encode_opaque(p, b->simple.sig, b->simple.sig_len);
	55	break;
f99d4fbd CH	56	case PNFS_BLOCK_VOLUME_SCSI:
	57	len = 4 + 4 + 4 + 4 + b->scsi.designator_len + 8;
	58	p = xdr_reserve_space(xdr, len);
	59	if (!p)
	60	return -ETOOSMALL;
	61
	62	*p++ = cpu_to_be32(b->type);
	63	*p++ = cpu_to_be32(b->scsi.code_set);
	64	*p++ = cpu_to_be32(b->scsi.designator_type);
	65	p = xdr_encode_opaque(p, b->scsi.designator, b->scsi.designator_len);
	66	p = xdr_encode_hyper(p, b->scsi.pr_key);
	67	break;
8650b8a0 CH	68	default:
	69	return -ENOTSUPP;
	70	}
	71
	72	return len;
	73	}
	74
	75	__be32
	76	nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
	77	struct nfsd4_getdeviceinfo *gdp)
	78	{
	79	struct pnfs_block_deviceaddr *dev = gdp->gd_device;
	80	int len = sizeof(__be32), ret, i;
	81	__be32 *p;
	82
	83	p = xdr_reserve_space(xdr, len + sizeof(__be32));
	84	if (!p)
	85	return nfserr_resource;
	86
	87	for (i = 0; i < dev->nr_volumes; i++) {
	88	ret = nfsd4_block_encode_volume(xdr, &dev->volumes[i]);
	89	if (ret < 0)
	90	return nfserrno(ret);
	91	len += ret;
	92	}
	93
	94	/*
	95	* Fill in the overall length and number of volumes at the beginning
	96	* of the layout.
	97	*/
	98	*p++ = cpu_to_be32(len);
	99	*p++ = cpu_to_be32(dev->nr_volumes);
	100	return 0;
	101	}
	102
	103	int
	104	nfsd4_block_decode_layoutupdate(__be32 p, u32 len, struct iomap *iomapp,
	105	u32 block_size)
	106	{
	107	struct iomap *iomaps;
4b15da44	108	u32 nr_iomaps, i;
8650b8a0 CH	109
	110	if (len < sizeof(u32)) {
	111	dprintk("%s: extent array too small: %u\n", __func__, len);
	112	return -EINVAL;
	113	}
4b15da44 BF	114	len -= sizeof(u32);
	115	if (len % PNFS_BLOCK_EXTENT_SIZE) {
	116	dprintk("%s: extent array invalid: %u\n", __func__, len);
	117	return -EINVAL;
	118	}
8650b8a0 CH	119
8650b8a0 CH	120	nr_iomaps = be32_to_cpup(p++);
4b15da44	121	if (nr_iomaps != len / PNFS_BLOCK_EXTENT_SIZE) {
8650b8a0	122	dprintk("%s: extent array size mismatch: %u/%u\n",
4b15da44	123	__func__, len, nr_iomaps);
8650b8a0 CH	124	return -EINVAL;
	125	}
	126
	127	iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL);
	128	if (!iomaps) {
	129	dprintk("%s: failed to allocate extent array\n", __func__);
	130	return -ENOMEM;
	131	}
	132
	133	for (i = 0; i < nr_iomaps; i++) {
	134	struct pnfs_block_extent bex;
	135
	136	memcpy(&bex.vol_id, p, sizeof(struct nfsd4_deviceid));
	137	p += XDR_QUADLEN(sizeof(struct nfsd4_deviceid));
	138
	139	p = xdr_decode_hyper(p, &bex.foff);
	140	if (bex.foff & (block_size - 1)) {
85369523	141	dprintk("%s: unaligned offset 0x%llx\n",
8650b8a0 CH	142	__func__, bex.foff);
	143	goto fail;
	144	}
	145	p = xdr_decode_hyper(p, &bex.len);
	146	if (bex.len & (block_size - 1)) {
85369523	147	dprintk("%s: unaligned length 0x%llx\n",
8650b8a0 CH	148	__func__, bex.foff);
	149	goto fail;
	150	}
	151	p = xdr_decode_hyper(p, &bex.soff);
	152	if (bex.soff & (block_size - 1)) {
85369523	153	dprintk("%s: unaligned disk offset 0x%llx\n",
8650b8a0 CH	154	__func__, bex.soff);
	155	goto fail;
	156	}
	157	bex.es = be32_to_cpup(p++);
	158	if (bex.es != PNFS_BLOCK_READWRITE_DATA) {
	159	dprintk("%s: incorrect extent state %d\n",
	160	__func__, bex.es);
	161	goto fail;
	162	}
	163
	164	iomaps[i].offset = bex.foff;
	165	iomaps[i].length = bex.len;
	166	}
	167
	168	*iomapp = iomaps;
	169	return nr_iomaps;
	170	fail:
	171	kfree(iomaps);
	172	return -EINVAL;
	173	}
f99d4fbd CH	174
	175	int
	176	nfsd4_scsi_decode_layoutupdate(__be32 p, u32 len, struct iomap *iomapp,
	177	u32 block_size)
	178	{
	179	struct iomap *iomaps;
	180	u32 nr_iomaps, expected, i;
	181
	182	if (len < sizeof(u32)) {
	183	dprintk("%s: extent array too small: %u\n", __func__, len);
	184	return -EINVAL;
	185	}
	186
	187	nr_iomaps = be32_to_cpup(p++);
	188	expected = sizeof(__be32) + nr_iomaps * PNFS_SCSI_RANGE_SIZE;
	189	if (len != expected) {
	190	dprintk("%s: extent array size mismatch: %u/%u\n",
	191	__func__, len, expected);
	192	return -EINVAL;
	193	}
	194
	195	iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL);
	196	if (!iomaps) {
	197	dprintk("%s: failed to allocate extent array\n", __func__);
	198	return -ENOMEM;
	199	}
	200
	201	for (i = 0; i < nr_iomaps; i++) {
	202	u64 val;
	203
	204	p = xdr_decode_hyper(p, &val);
	205	if (val & (block_size - 1)) {
	206	dprintk("%s: unaligned offset 0x%llx\n", __func__, val);
	207	goto fail;
	208	}
	209	iomaps[i].offset = val;
	210
	211	p = xdr_decode_hyper(p, &val);
	212	if (val & (block_size - 1)) {
	213	dprintk("%s: unaligned length 0x%llx\n", __func__, val);
	214	goto fail;
	215	}
	216	iomaps[i].length = val;
	217	}
	218
	219	*iomapp = iomaps;
	220	return nr_iomaps;
	221	fail:
	222	kfree(iomaps);
	223	return -EINVAL;
	224	}