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