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Commit | Line | Data |
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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; | |
108 | u32 nr_iomaps, expected, i; | |
109 | ||
110 | if (len < sizeof(u32)) { | |
111 | dprintk("%s: extent array too small: %u\n", __func__, len); | |
112 | return -EINVAL; | |
113 | } | |
114 | ||
115 | nr_iomaps = be32_to_cpup(p++); | |
8bb28975 | 116 | expected = sizeof(__be32) + nr_iomaps * PNFS_BLOCK_EXTENT_SIZE; |
8650b8a0 CH |
117 | if (len != expected) { |
118 | dprintk("%s: extent array size mismatch: %u/%u\n", | |
119 | __func__, len, expected); | |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL); | |
124 | if (!iomaps) { | |
125 | dprintk("%s: failed to allocate extent array\n", __func__); | |
126 | return -ENOMEM; | |
127 | } | |
128 | ||
129 | for (i = 0; i < nr_iomaps; i++) { | |
130 | struct pnfs_block_extent bex; | |
131 | ||
132 | memcpy(&bex.vol_id, p, sizeof(struct nfsd4_deviceid)); | |
133 | p += XDR_QUADLEN(sizeof(struct nfsd4_deviceid)); | |
134 | ||
135 | p = xdr_decode_hyper(p, &bex.foff); | |
136 | if (bex.foff & (block_size - 1)) { | |
85369523 | 137 | dprintk("%s: unaligned offset 0x%llx\n", |
8650b8a0 CH |
138 | __func__, bex.foff); |
139 | goto fail; | |
140 | } | |
141 | p = xdr_decode_hyper(p, &bex.len); | |
142 | if (bex.len & (block_size - 1)) { | |
85369523 | 143 | dprintk("%s: unaligned length 0x%llx\n", |
8650b8a0 CH |
144 | __func__, bex.foff); |
145 | goto fail; | |
146 | } | |
147 | p = xdr_decode_hyper(p, &bex.soff); | |
148 | if (bex.soff & (block_size - 1)) { | |
85369523 | 149 | dprintk("%s: unaligned disk offset 0x%llx\n", |
8650b8a0 CH |
150 | __func__, bex.soff); |
151 | goto fail; | |
152 | } | |
153 | bex.es = be32_to_cpup(p++); | |
154 | if (bex.es != PNFS_BLOCK_READWRITE_DATA) { | |
155 | dprintk("%s: incorrect extent state %d\n", | |
156 | __func__, bex.es); | |
157 | goto fail; | |
158 | } | |
159 | ||
160 | iomaps[i].offset = bex.foff; | |
161 | iomaps[i].length = bex.len; | |
162 | } | |
163 | ||
164 | *iomapp = iomaps; | |
165 | return nr_iomaps; | |
166 | fail: | |
167 | kfree(iomaps); | |
168 | return -EINVAL; | |
169 | } | |
f99d4fbd CH |
170 | |
171 | int | |
172 | nfsd4_scsi_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp, | |
173 | u32 block_size) | |
174 | { | |
175 | struct iomap *iomaps; | |
176 | u32 nr_iomaps, expected, i; | |
177 | ||
178 | if (len < sizeof(u32)) { | |
179 | dprintk("%s: extent array too small: %u\n", __func__, len); | |
180 | return -EINVAL; | |
181 | } | |
182 | ||
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); | |
188 | return -EINVAL; | |
189 | } | |
190 | ||
191 | iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL); | |
192 | if (!iomaps) { | |
193 | dprintk("%s: failed to allocate extent array\n", __func__); | |
194 | return -ENOMEM; | |
195 | } | |
196 | ||
197 | for (i = 0; i < nr_iomaps; i++) { | |
198 | u64 val; | |
199 | ||
200 | p = xdr_decode_hyper(p, &val); | |
201 | if (val & (block_size - 1)) { | |
202 | dprintk("%s: unaligned offset 0x%llx\n", __func__, val); | |
203 | goto fail; | |
204 | } | |
205 | iomaps[i].offset = val; | |
206 | ||
207 | p = xdr_decode_hyper(p, &val); | |
208 | if (val & (block_size - 1)) { | |
209 | dprintk("%s: unaligned length 0x%llx\n", __func__, val); | |
210 | goto fail; | |
211 | } | |
212 | iomaps[i].length = val; | |
213 | } | |
214 | ||
215 | *iomapp = iomaps; | |
216 | return nr_iomaps; | |
217 | fail: | |
218 | kfree(iomaps); | |
219 | return -EINVAL; | |
220 | } |