[mirror_ubuntu-bionic-kernel.git] / fs / nfsd / blocklayoutxdr.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2014-2016 Christoph Hellwig.
 */
#include <linux/sunrpc/svc.h>
#include <linux/exportfs.h>
#include <linux/iomap.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 + (XDR_QUADLEN(b->simple.sig_len) << 2);
		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 + (XDR_QUADLEN(b->scsi.designator_len) << 2) + 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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
8650b8a0	2	/*
f99d4fbd	3	* Copyright (c) 2014-2016 Christoph Hellwig.
8650b8a0 CH	4	*/
	5	#include <linux/sunrpc/svc.h>
	6	#include <linux/exportfs.h>
199a31c6	7	#include <linux/iomap.h>
8650b8a0 CH	8	#include <linux/nfs4.h>
	9
	10	#include "nfsd.h"
	11	#include "blocklayoutxdr.h"
	12
	13	#define NFSDDBG_FACILITY NFSDDBG_PNFS
	14
	15
	16	__be32
	17	nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
	18	struct nfsd4_layoutget *lgp)
	19	{
	20	struct pnfs_block_extent *b = lgp->lg_content;
	21	int len = sizeof(__be32) + 5 * sizeof(__be64) + sizeof(__be32);
	22	__be32 *p;
	23
	24	p = xdr_reserve_space(xdr, sizeof(__be32) + len);
	25	if (!p)
	26	return nfserr_toosmall;
	27
	28	*p++ = cpu_to_be32(len);
	29	p++ = cpu_to_be32(1); / we always return a single extent */
	30
	31	p = xdr_encode_opaque_fixed(p, &b->vol_id,
	32	sizeof(struct nfsd4_deviceid));
	33	p = xdr_encode_hyper(p, b->foff);
	34	p = xdr_encode_hyper(p, b->len);
	35	p = xdr_encode_hyper(p, b->soff);
	36	*p++ = cpu_to_be32(b->es);
	37	return 0;
	38	}
	39
	40	static int
	41	nfsd4_block_encode_volume(struct xdr_stream xdr, struct pnfs_block_volume b)
	42	{
	43	__be32 *p;
	44	int len;
	45
	46	switch (b->type) {
	47	case PNFS_BLOCK_VOLUME_SIMPLE:
dd51db18	48	len = 4 + 4 + 8 + 4 + (XDR_QUADLEN(b->simple.sig_len) << 2);
8650b8a0 CH	49	p = xdr_reserve_space(xdr, len);
	50	if (!p)
	51	return -ETOOSMALL;
	52
	53	*p++ = cpu_to_be32(b->type);
	54	p++ = cpu_to_be32(1); / single signature */
	55	p = xdr_encode_hyper(p, b->simple.offset);
	56	p = xdr_encode_opaque(p, b->simple.sig, b->simple.sig_len);
	57	break;
f99d4fbd	58	case PNFS_BLOCK_VOLUME_SCSI:
dd51db18	59	len = 4 + 4 + 4 + 4 + (XDR_QUADLEN(b->scsi.designator_len) << 2) + 8;
f99d4fbd CH	60	p = xdr_reserve_space(xdr, len);
	61	if (!p)
	62	return -ETOOSMALL;
	63
	64	*p++ = cpu_to_be32(b->type);
	65	*p++ = cpu_to_be32(b->scsi.code_set);
	66	*p++ = cpu_to_be32(b->scsi.designator_type);
	67	p = xdr_encode_opaque(p, b->scsi.designator, b->scsi.designator_len);
	68	p = xdr_encode_hyper(p, b->scsi.pr_key);
	69	break;
8650b8a0 CH	70	default:
	71	return -ENOTSUPP;
	72	}
	73
	74	return len;
	75	}
	76
	77	__be32
	78	nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
	79	struct nfsd4_getdeviceinfo *gdp)
	80	{
	81	struct pnfs_block_deviceaddr *dev = gdp->gd_device;
	82	int len = sizeof(__be32), ret, i;
	83	__be32 *p;
	84
	85	p = xdr_reserve_space(xdr, len + sizeof(__be32));
	86	if (!p)
	87	return nfserr_resource;
	88
	89	for (i = 0; i < dev->nr_volumes; i++) {
	90	ret = nfsd4_block_encode_volume(xdr, &dev->volumes[i]);
	91	if (ret < 0)
	92	return nfserrno(ret);
	93	len += ret;
	94	}
	95
	96	/*
	97	* Fill in the overall length and number of volumes at the beginning
	98	* of the layout.
	99	*/
	100	*p++ = cpu_to_be32(len);
	101	*p++ = cpu_to_be32(dev->nr_volumes);
	102	return 0;
	103	}
	104
	105	int
	106	nfsd4_block_decode_layoutupdate(__be32 p, u32 len, struct iomap *iomapp,
	107	u32 block_size)
	108	{
	109	struct iomap *iomaps;
4b15da44	110	u32 nr_iomaps, i;
8650b8a0 CH	111
	112	if (len < sizeof(u32)) {
	113	dprintk("%s: extent array too small: %u\n", __func__, len);
	114	return -EINVAL;
	115	}
4b15da44 BF	116	len -= sizeof(u32);
	117	if (len % PNFS_BLOCK_EXTENT_SIZE) {
	118	dprintk("%s: extent array invalid: %u\n", __func__, len);
	119	return -EINVAL;
	120	}
8650b8a0 CH	121
8650b8a0 CH	122	nr_iomaps = be32_to_cpup(p++);
4b15da44	123	if (nr_iomaps != len / PNFS_BLOCK_EXTENT_SIZE) {
8650b8a0	124	dprintk("%s: extent array size mismatch: %u/%u\n",
4b15da44	125	__func__, len, nr_iomaps);
8650b8a0 CH	126	return -EINVAL;
	127	}
	128
	129	iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL);
	130	if (!iomaps) {
	131	dprintk("%s: failed to allocate extent array\n", __func__);
	132	return -ENOMEM;
	133	}
	134
	135	for (i = 0; i < nr_iomaps; i++) {
	136	struct pnfs_block_extent bex;
	137
	138	memcpy(&bex.vol_id, p, sizeof(struct nfsd4_deviceid));
	139	p += XDR_QUADLEN(sizeof(struct nfsd4_deviceid));
	140
	141	p = xdr_decode_hyper(p, &bex.foff);
	142	if (bex.foff & (block_size - 1)) {
85369523	143	dprintk("%s: unaligned offset 0x%llx\n",
8650b8a0 CH	144	__func__, bex.foff);
	145	goto fail;
	146	}
	147	p = xdr_decode_hyper(p, &bex.len);
	148	if (bex.len & (block_size - 1)) {
85369523	149	dprintk("%s: unaligned length 0x%llx\n",
8650b8a0 CH	150	__func__, bex.foff);
	151	goto fail;
	152	}
	153	p = xdr_decode_hyper(p, &bex.soff);
	154	if (bex.soff & (block_size - 1)) {
85369523	155	dprintk("%s: unaligned disk offset 0x%llx\n",
8650b8a0 CH	156	__func__, bex.soff);
	157	goto fail;
	158	}
	159	bex.es = be32_to_cpup(p++);
	160	if (bex.es != PNFS_BLOCK_READWRITE_DATA) {
	161	dprintk("%s: incorrect extent state %d\n",
	162	__func__, bex.es);
	163	goto fail;
	164	}
	165
	166	iomaps[i].offset = bex.foff;
	167	iomaps[i].length = bex.len;
	168	}
	169
	170	*iomapp = iomaps;
	171	return nr_iomaps;
	172	fail:
	173	kfree(iomaps);
	174	return -EINVAL;
	175	}
f99d4fbd CH	176
	177	int
	178	nfsd4_scsi_decode_layoutupdate(__be32 p, u32 len, struct iomap *iomapp,
	179	u32 block_size)
	180	{
	181	struct iomap *iomaps;
	182	u32 nr_iomaps, expected, i;
	183
	184	if (len < sizeof(u32)) {
	185	dprintk("%s: extent array too small: %u\n", __func__, len);
	186	return -EINVAL;
	187	}
	188
	189	nr_iomaps = be32_to_cpup(p++);
	190	expected = sizeof(__be32) + nr_iomaps * PNFS_SCSI_RANGE_SIZE;
	191	if (len != expected) {
	192	dprintk("%s: extent array size mismatch: %u/%u\n",
	193	__func__, len, expected);
	194	return -EINVAL;
	195	}
	196
	197	iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL);
	198	if (!iomaps) {
	199	dprintk("%s: failed to allocate extent array\n", __func__);
	200	return -ENOMEM;
	201	}
	202
	203	for (i = 0; i < nr_iomaps; i++) {
	204	u64 val;
	205
	206	p = xdr_decode_hyper(p, &val);
	207	if (val & (block_size - 1)) {
	208	dprintk("%s: unaligned offset 0x%llx\n", __func__, val);
	209	goto fail;
	210	}
	211	iomaps[i].offset = val;
	212
	213	p = xdr_decode_hyper(p, &val);
	214	if (val & (block_size - 1)) {
	215	dprintk("%s: unaligned length 0x%llx\n", __func__, val);
	216	goto fail;
	217	}
	218	iomaps[i].length = val;
	219	}
	220
	221	*iomapp = iomaps;
	222	return nr_iomaps;
	223	fail:
	224	kfree(iomaps);
	225	return -EINVAL;
	226	}