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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" | |
cb12fae1 | 12 | #include "vfs.h" |
8650b8a0 CH |
13 | |
14 | #define NFSDDBG_FACILITY NFSDDBG_PNFS | |
15 | ||
16 | ||
17 | __be32 | |
18 | nfsd4_block_encode_layoutget(struct xdr_stream *xdr, | |
19 | struct nfsd4_layoutget *lgp) | |
20 | { | |
21 | struct pnfs_block_extent *b = lgp->lg_content; | |
22 | int len = sizeof(__be32) + 5 * sizeof(__be64) + sizeof(__be32); | |
23 | __be32 *p; | |
24 | ||
25 | p = xdr_reserve_space(xdr, sizeof(__be32) + len); | |
26 | if (!p) | |
27 | return nfserr_toosmall; | |
28 | ||
29 | *p++ = cpu_to_be32(len); | |
30 | *p++ = cpu_to_be32(1); /* we always return a single extent */ | |
31 | ||
32 | p = xdr_encode_opaque_fixed(p, &b->vol_id, | |
33 | sizeof(struct nfsd4_deviceid)); | |
34 | p = xdr_encode_hyper(p, b->foff); | |
35 | p = xdr_encode_hyper(p, b->len); | |
36 | p = xdr_encode_hyper(p, b->soff); | |
37 | *p++ = cpu_to_be32(b->es); | |
38 | return 0; | |
39 | } | |
40 | ||
41 | static int | |
42 | nfsd4_block_encode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b) | |
43 | { | |
44 | __be32 *p; | |
45 | int len; | |
46 | ||
47 | switch (b->type) { | |
48 | case PNFS_BLOCK_VOLUME_SIMPLE: | |
dd51db18 | 49 | len = 4 + 4 + 8 + 4 + (XDR_QUADLEN(b->simple.sig_len) << 2); |
8650b8a0 CH |
50 | p = xdr_reserve_space(xdr, len); |
51 | if (!p) | |
52 | return -ETOOSMALL; | |
53 | ||
54 | *p++ = cpu_to_be32(b->type); | |
55 | *p++ = cpu_to_be32(1); /* single signature */ | |
56 | p = xdr_encode_hyper(p, b->simple.offset); | |
57 | p = xdr_encode_opaque(p, b->simple.sig, b->simple.sig_len); | |
58 | break; | |
f99d4fbd | 59 | case PNFS_BLOCK_VOLUME_SCSI: |
dd51db18 | 60 | len = 4 + 4 + 4 + 4 + (XDR_QUADLEN(b->scsi.designator_len) << 2) + 8; |
f99d4fbd CH |
61 | p = xdr_reserve_space(xdr, len); |
62 | if (!p) | |
63 | return -ETOOSMALL; | |
64 | ||
65 | *p++ = cpu_to_be32(b->type); | |
66 | *p++ = cpu_to_be32(b->scsi.code_set); | |
67 | *p++ = cpu_to_be32(b->scsi.designator_type); | |
68 | p = xdr_encode_opaque(p, b->scsi.designator, b->scsi.designator_len); | |
69 | p = xdr_encode_hyper(p, b->scsi.pr_key); | |
70 | break; | |
8650b8a0 CH |
71 | default: |
72 | return -ENOTSUPP; | |
73 | } | |
74 | ||
75 | return len; | |
76 | } | |
77 | ||
78 | __be32 | |
79 | nfsd4_block_encode_getdeviceinfo(struct xdr_stream *xdr, | |
80 | struct nfsd4_getdeviceinfo *gdp) | |
81 | { | |
82 | struct pnfs_block_deviceaddr *dev = gdp->gd_device; | |
83 | int len = sizeof(__be32), ret, i; | |
84 | __be32 *p; | |
85 | ||
86 | p = xdr_reserve_space(xdr, len + sizeof(__be32)); | |
87 | if (!p) | |
88 | return nfserr_resource; | |
89 | ||
90 | for (i = 0; i < dev->nr_volumes; i++) { | |
91 | ret = nfsd4_block_encode_volume(xdr, &dev->volumes[i]); | |
92 | if (ret < 0) | |
93 | return nfserrno(ret); | |
94 | len += ret; | |
95 | } | |
96 | ||
97 | /* | |
98 | * Fill in the overall length and number of volumes at the beginning | |
99 | * of the layout. | |
100 | */ | |
101 | *p++ = cpu_to_be32(len); | |
102 | *p++ = cpu_to_be32(dev->nr_volumes); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | int | |
107 | nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp, | |
108 | u32 block_size) | |
109 | { | |
110 | struct iomap *iomaps; | |
4b15da44 | 111 | u32 nr_iomaps, i; |
8650b8a0 CH |
112 | |
113 | if (len < sizeof(u32)) { | |
114 | dprintk("%s: extent array too small: %u\n", __func__, len); | |
115 | return -EINVAL; | |
116 | } | |
4b15da44 BF |
117 | len -= sizeof(u32); |
118 | if (len % PNFS_BLOCK_EXTENT_SIZE) { | |
119 | dprintk("%s: extent array invalid: %u\n", __func__, len); | |
120 | return -EINVAL; | |
121 | } | |
8650b8a0 CH |
122 | |
123 | nr_iomaps = be32_to_cpup(p++); | |
4b15da44 | 124 | if (nr_iomaps != len / PNFS_BLOCK_EXTENT_SIZE) { |
8650b8a0 | 125 | dprintk("%s: extent array size mismatch: %u/%u\n", |
4b15da44 | 126 | __func__, len, nr_iomaps); |
8650b8a0 CH |
127 | return -EINVAL; |
128 | } | |
129 | ||
130 | iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL); | |
131 | if (!iomaps) { | |
132 | dprintk("%s: failed to allocate extent array\n", __func__); | |
133 | return -ENOMEM; | |
134 | } | |
135 | ||
136 | for (i = 0; i < nr_iomaps; i++) { | |
137 | struct pnfs_block_extent bex; | |
138 | ||
139 | memcpy(&bex.vol_id, p, sizeof(struct nfsd4_deviceid)); | |
140 | p += XDR_QUADLEN(sizeof(struct nfsd4_deviceid)); | |
141 | ||
142 | p = xdr_decode_hyper(p, &bex.foff); | |
143 | if (bex.foff & (block_size - 1)) { | |
85369523 | 144 | dprintk("%s: unaligned offset 0x%llx\n", |
8650b8a0 CH |
145 | __func__, bex.foff); |
146 | goto fail; | |
147 | } | |
148 | p = xdr_decode_hyper(p, &bex.len); | |
149 | if (bex.len & (block_size - 1)) { | |
85369523 | 150 | dprintk("%s: unaligned length 0x%llx\n", |
8650b8a0 CH |
151 | __func__, bex.foff); |
152 | goto fail; | |
153 | } | |
154 | p = xdr_decode_hyper(p, &bex.soff); | |
155 | if (bex.soff & (block_size - 1)) { | |
85369523 | 156 | dprintk("%s: unaligned disk offset 0x%llx\n", |
8650b8a0 CH |
157 | __func__, bex.soff); |
158 | goto fail; | |
159 | } | |
160 | bex.es = be32_to_cpup(p++); | |
161 | if (bex.es != PNFS_BLOCK_READWRITE_DATA) { | |
162 | dprintk("%s: incorrect extent state %d\n", | |
163 | __func__, bex.es); | |
164 | goto fail; | |
165 | } | |
166 | ||
167 | iomaps[i].offset = bex.foff; | |
168 | iomaps[i].length = bex.len; | |
169 | } | |
170 | ||
171 | *iomapp = iomaps; | |
172 | return nr_iomaps; | |
173 | fail: | |
174 | kfree(iomaps); | |
175 | return -EINVAL; | |
176 | } | |
f99d4fbd CH |
177 | |
178 | int | |
179 | nfsd4_scsi_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp, | |
180 | u32 block_size) | |
181 | { | |
182 | struct iomap *iomaps; | |
183 | u32 nr_iomaps, expected, i; | |
184 | ||
185 | if (len < sizeof(u32)) { | |
186 | dprintk("%s: extent array too small: %u\n", __func__, len); | |
187 | return -EINVAL; | |
188 | } | |
189 | ||
190 | nr_iomaps = be32_to_cpup(p++); | |
191 | expected = sizeof(__be32) + nr_iomaps * PNFS_SCSI_RANGE_SIZE; | |
192 | if (len != expected) { | |
193 | dprintk("%s: extent array size mismatch: %u/%u\n", | |
194 | __func__, len, expected); | |
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL); | |
199 | if (!iomaps) { | |
200 | dprintk("%s: failed to allocate extent array\n", __func__); | |
201 | return -ENOMEM; | |
202 | } | |
203 | ||
204 | for (i = 0; i < nr_iomaps; i++) { | |
205 | u64 val; | |
206 | ||
207 | p = xdr_decode_hyper(p, &val); | |
208 | if (val & (block_size - 1)) { | |
209 | dprintk("%s: unaligned offset 0x%llx\n", __func__, val); | |
210 | goto fail; | |
211 | } | |
212 | iomaps[i].offset = val; | |
213 | ||
214 | p = xdr_decode_hyper(p, &val); | |
215 | if (val & (block_size - 1)) { | |
216 | dprintk("%s: unaligned length 0x%llx\n", __func__, val); | |
217 | goto fail; | |
218 | } | |
219 | iomaps[i].length = val; | |
220 | } | |
221 | ||
222 | *iomapp = iomaps; | |
223 | return nr_iomaps; | |
224 | fail: | |
225 | kfree(iomaps); | |
226 | return -EINVAL; | |
227 | } |