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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" | |
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 | |
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 | } |