2 * Copyright (c) 2014-2016 Christoph Hellwig.
4 #include <linux/sunrpc/svc.h>
5 #include <linux/exportfs.h>
6 #include <linux/nfs4.h>
9 #include "blocklayoutxdr.h"
11 #define NFSDDBG_FACILITY NFSDDBG_PNFS
15 nfsd4_block_encode_layoutget(struct xdr_stream *xdr,
16 struct nfsd4_layoutget *lgp)
18 struct pnfs_block_extent *b = lgp->lg_content;
19 int len = sizeof(__be32) + 5 * sizeof(__be64) + sizeof(__be32);
22 p = xdr_reserve_space(xdr, sizeof(__be32) + len);
24 return nfserr_toosmall;
26 *p++ = cpu_to_be32(len);
27 *p++ = cpu_to_be32(1); /* we always return a single extent */
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);
39 nfsd4_block_encode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b)
45 case PNFS_BLOCK_VOLUME_SIMPLE:
46 len = 4 + 4 + 8 + 4 + b->simple.sig_len;
47 p = xdr_reserve_space(xdr, len);
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);
56 case PNFS_BLOCK_VOLUME_SCSI:
57 len = 4 + 4 + 4 + 4 + b->scsi.designator_len + 8;
58 p = xdr_reserve_space(xdr, len);
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);
76 nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr,
77 struct nfsd4_getdeviceinfo *gdp)
79 struct pnfs_block_deviceaddr *dev = gdp->gd_device;
80 int len = sizeof(__be32), ret, i;
83 p = xdr_reserve_space(xdr, len + sizeof(__be32));
85 return nfserr_resource;
87 for (i = 0; i < dev->nr_volumes; i++) {
88 ret = nfsd4_block_encode_volume(xdr, &dev->volumes[i]);
95 * Fill in the overall length and number of volumes at the beginning
98 *p++ = cpu_to_be32(len);
99 *p++ = cpu_to_be32(dev->nr_volumes);
104 nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
107 struct iomap *iomaps;
108 u32 nr_iomaps, expected, i;
110 if (len < sizeof(u32)) {
111 dprintk("%s: extent array too small: %u\n", __func__, len);
115 nr_iomaps = be32_to_cpup(p++);
116 expected = sizeof(__be32) + nr_iomaps * PNFS_BLOCK_EXTENT_SIZE;
117 if (len != expected) {
118 dprintk("%s: extent array size mismatch: %u/%u\n",
119 __func__, len, expected);
123 iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL);
125 dprintk("%s: failed to allocate extent array\n", __func__);
129 for (i = 0; i < nr_iomaps; i++) {
130 struct pnfs_block_extent bex;
132 memcpy(&bex.vol_id, p, sizeof(struct nfsd4_deviceid));
133 p += XDR_QUADLEN(sizeof(struct nfsd4_deviceid));
135 p = xdr_decode_hyper(p, &bex.foff);
136 if (bex.foff & (block_size - 1)) {
137 dprintk("%s: unaligned offset 0x%llx\n",
141 p = xdr_decode_hyper(p, &bex.len);
142 if (bex.len & (block_size - 1)) {
143 dprintk("%s: unaligned length 0x%llx\n",
147 p = xdr_decode_hyper(p, &bex.soff);
148 if (bex.soff & (block_size - 1)) {
149 dprintk("%s: unaligned disk offset 0x%llx\n",
153 bex.es = be32_to_cpup(p++);
154 if (bex.es != PNFS_BLOCK_READWRITE_DATA) {
155 dprintk("%s: incorrect extent state %d\n",
160 iomaps[i].offset = bex.foff;
161 iomaps[i].length = bex.len;
172 nfsd4_scsi_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp,
175 struct iomap *iomaps;
176 u32 nr_iomaps, expected, i;
178 if (len < sizeof(u32)) {
179 dprintk("%s: extent array too small: %u\n", __func__, len);
183 nr_iomaps = be32_to_cpup(p++);
184 expected = sizeof(__be32) + nr_iomaps * PNFS_SCSI_RANGE_SIZE;
185 if (len != expected) {
186 dprintk("%s: extent array size mismatch: %u/%u\n",
187 __func__, len, expected);
191 iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL);
193 dprintk("%s: failed to allocate extent array\n", __func__);
197 for (i = 0; i < nr_iomaps; i++) {
200 p = xdr_decode_hyper(p, &val);
201 if (val & (block_size - 1)) {
202 dprintk("%s: unaligned offset 0x%llx\n", __func__, val);
205 iomaps[i].offset = val;
207 p = xdr_decode_hyper(p, &val);
208 if (val & (block_size - 1)) {
209 dprintk("%s: unaligned length 0x%llx\n", __func__, val);
212 iomaps[i].length = val;