callback_xdr.c (e6f684f6443dd37384c63d2f27571350e0b5c8aa) callback_xdr.c (5704fdeb41c9fb282ae576516f221ea0b8f64b2b)
1/*
2 * linux/fs/nfs/callback_xdr.c
3 *
4 * Copyright (C) 2004 Trond Myklebust
5 *
6 * NFSv4 callback encode/decode procedures
7 */
8#include <linux/kernel.h>

--- 27 unchanged lines hidden (view full) ---

36
37static struct callback_op callback_ops[];
38
39static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp)
40{
41 return htonl(NFS4_OK);
42}
43
1/*
2 * linux/fs/nfs/callback_xdr.c
3 *
4 * Copyright (C) 2004 Trond Myklebust
5 *
6 * NFSv4 callback encode/decode procedures
7 */
8#include <linux/kernel.h>

--- 27 unchanged lines hidden (view full) ---

36
37static struct callback_op callback_ops[];
38
39static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp)
40{
41 return htonl(NFS4_OK);
42}
43
44static int nfs4_decode_void(struct svc_rqst *rqstp, uint32_t *p, void *dummy)
44static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
45{
46 return xdr_argsize_check(rqstp, p);
47}
48
45{
46 return xdr_argsize_check(rqstp, p);
47}
48
49static int nfs4_encode_void(struct svc_rqst *rqstp, uint32_t *p, void *dummy)
49static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
50{
51 return xdr_ressize_check(rqstp, p);
52}
53
50{
51 return xdr_ressize_check(rqstp, p);
52}
53
54static uint32_t *read_buf(struct xdr_stream *xdr, int nbytes)
54static __be32 *read_buf(struct xdr_stream *xdr, int nbytes)
55{
55{
56 uint32_t *p;
56 __be32 *p;
57
58 p = xdr_inline_decode(xdr, nbytes);
59 if (unlikely(p == NULL))
60 printk(KERN_WARNING "NFSv4 callback reply buffer overflowed!\n");
61 return p;
62}
63
64static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str)
65{
57
58 p = xdr_inline_decode(xdr, nbytes);
59 if (unlikely(p == NULL))
60 printk(KERN_WARNING "NFSv4 callback reply buffer overflowed!\n");
61 return p;
62}
63
64static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str)
65{
66 uint32_t *p;
66 __be32 *p;
67
68 p = read_buf(xdr, 4);
69 if (unlikely(p == NULL))
70 return htonl(NFS4ERR_RESOURCE);
71 *len = ntohl(*p);
72
73 if (*len != 0) {
74 p = read_buf(xdr, *len);
75 if (unlikely(p == NULL))
76 return htonl(NFS4ERR_RESOURCE);
77 *str = (const char *)p;
78 } else
79 *str = NULL;
80
81 return 0;
82}
83
84static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
85{
67
68 p = read_buf(xdr, 4);
69 if (unlikely(p == NULL))
70 return htonl(NFS4ERR_RESOURCE);
71 *len = ntohl(*p);
72
73 if (*len != 0) {
74 p = read_buf(xdr, *len);
75 if (unlikely(p == NULL))
76 return htonl(NFS4ERR_RESOURCE);
77 *str = (const char *)p;
78 } else
79 *str = NULL;
80
81 return 0;
82}
83
84static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
85{
86 uint32_t *p;
86 __be32 *p;
87
88 p = read_buf(xdr, 4);
89 if (unlikely(p == NULL))
90 return htonl(NFS4ERR_RESOURCE);
91 fh->size = ntohl(*p);
92 if (fh->size > NFS4_FHSIZE)
93 return htonl(NFS4ERR_BADHANDLE);
94 p = read_buf(xdr, fh->size);
95 if (unlikely(p == NULL))
96 return htonl(NFS4ERR_RESOURCE);
97 memcpy(&fh->data[0], p, fh->size);
98 memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size);
99 return 0;
100}
101
102static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
103{
87
88 p = read_buf(xdr, 4);
89 if (unlikely(p == NULL))
90 return htonl(NFS4ERR_RESOURCE);
91 fh->size = ntohl(*p);
92 if (fh->size > NFS4_FHSIZE)
93 return htonl(NFS4ERR_BADHANDLE);
94 p = read_buf(xdr, fh->size);
95 if (unlikely(p == NULL))
96 return htonl(NFS4ERR_RESOURCE);
97 memcpy(&fh->data[0], p, fh->size);
98 memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size);
99 return 0;
100}
101
102static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
103{
104 uint32_t *p;
104 __be32 *p;
105 unsigned int attrlen;
106
107 p = read_buf(xdr, 4);
108 if (unlikely(p == NULL))
109 return htonl(NFS4ERR_RESOURCE);
110 attrlen = ntohl(*p);
111 p = read_buf(xdr, attrlen << 2);
112 if (unlikely(p == NULL))
113 return htonl(NFS4ERR_RESOURCE);
114 if (likely(attrlen > 0))
115 bitmap[0] = ntohl(*p++);
116 if (attrlen > 1)
117 bitmap[1] = ntohl(*p);
118 return 0;
119}
120
121static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
122{
105 unsigned int attrlen;
106
107 p = read_buf(xdr, 4);
108 if (unlikely(p == NULL))
109 return htonl(NFS4ERR_RESOURCE);
110 attrlen = ntohl(*p);
111 p = read_buf(xdr, attrlen << 2);
112 if (unlikely(p == NULL))
113 return htonl(NFS4ERR_RESOURCE);
114 if (likely(attrlen > 0))
115 bitmap[0] = ntohl(*p++);
116 if (attrlen > 1)
117 bitmap[1] = ntohl(*p);
118 return 0;
119}
120
121static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
122{
123 uint32_t *p;
123 __be32 *p;
124
125 p = read_buf(xdr, 16);
126 if (unlikely(p == NULL))
127 return htonl(NFS4ERR_RESOURCE);
128 memcpy(stateid->data, p, 16);
129 return 0;
130}
131
132static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr)
133{
124
125 p = read_buf(xdr, 16);
126 if (unlikely(p == NULL))
127 return htonl(NFS4ERR_RESOURCE);
128 memcpy(stateid->data, p, 16);
129 return 0;
130}
131
132static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr)
133{
134 uint32_t *p;
134 __be32 *p;
135 unsigned int minor_version;
136 __be32 status;
137
138 status = decode_string(xdr, &hdr->taglen, &hdr->tag);
139 if (unlikely(status != 0))
140 return status;
141 /* We do not like overly long tags! */
142 if (hdr->taglen > CB_OP_TAGLEN_MAXSZ-12 || hdr->taglen < 0) {

--- 13 unchanged lines hidden (view full) ---

156 }
157 hdr->callback_ident = ntohl(*p++);
158 hdr->nops = ntohl(*p);
159 return 0;
160}
161
162static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op)
163{
135 unsigned int minor_version;
136 __be32 status;
137
138 status = decode_string(xdr, &hdr->taglen, &hdr->tag);
139 if (unlikely(status != 0))
140 return status;
141 /* We do not like overly long tags! */
142 if (hdr->taglen > CB_OP_TAGLEN_MAXSZ-12 || hdr->taglen < 0) {

--- 13 unchanged lines hidden (view full) ---

156 }
157 hdr->callback_ident = ntohl(*p++);
158 hdr->nops = ntohl(*p);
159 return 0;
160}
161
162static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op)
163{
164 uint32_t *p;
164 __be32 *p;
165 p = read_buf(xdr, 4);
166 if (unlikely(p == NULL))
167 return htonl(NFS4ERR_RESOURCE);
168 *op = ntohl(*p);
169 return 0;
170}
171
172static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args)

--- 7 unchanged lines hidden (view full) ---

180 status = decode_bitmap(xdr, args->bitmap);
181out:
182 dprintk("%s: exit with status = %d\n", __FUNCTION__, status);
183 return status;
184}
185
186static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args)
187{
165 p = read_buf(xdr, 4);
166 if (unlikely(p == NULL))
167 return htonl(NFS4ERR_RESOURCE);
168 *op = ntohl(*p);
169 return 0;
170}
171
172static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args)

--- 7 unchanged lines hidden (view full) ---

180 status = decode_bitmap(xdr, args->bitmap);
181out:
182 dprintk("%s: exit with status = %d\n", __FUNCTION__, status);
183 return status;
184}
185
186static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args)
187{
188 uint32_t *p;
188 __be32 *p;
189 __be32 status;
190
191 args->addr = &rqstp->rq_addr;
192 status = decode_stateid(xdr, &args->stateid);
193 if (unlikely(status != 0))
194 goto out;
195 p = read_buf(xdr, 4);
196 if (unlikely(p == NULL)) {

--- 4 unchanged lines hidden (view full) ---

201 status = decode_fh(xdr, &args->fh);
202out:
203 dprintk("%s: exit with status = %d\n", __FUNCTION__, status);
204 return status;
205}
206
207static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
208{
189 __be32 status;
190
191 args->addr = &rqstp->rq_addr;
192 status = decode_stateid(xdr, &args->stateid);
193 if (unlikely(status != 0))
194 goto out;
195 p = read_buf(xdr, 4);
196 if (unlikely(p == NULL)) {

--- 4 unchanged lines hidden (view full) ---

201 status = decode_fh(xdr, &args->fh);
202out:
203 dprintk("%s: exit with status = %d\n", __FUNCTION__, status);
204 return status;
205}
206
207static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
208{
209 uint32_t *p;
209 __be32 *p;
210
211 p = xdr_reserve_space(xdr, 4 + len);
212 if (unlikely(p == NULL))
213 return htonl(NFS4ERR_RESOURCE);
214 xdr_encode_opaque(p, str, len);
215 return 0;
216}
217
218#define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE)
219#define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY)
210
211 p = xdr_reserve_space(xdr, 4 + len);
212 if (unlikely(p == NULL))
213 return htonl(NFS4ERR_RESOURCE);
214 xdr_encode_opaque(p, str, len);
215 return 0;
216}
217
218#define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE)
219#define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY)
220static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, uint32_t **savep)
220static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep)
221{
221{
222 uint32_t bm[2];
223 uint32_t *p;
222 __be32 bm[2];
223 __be32 *p;
224
225 bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0);
226 bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1);
227 if (bm[1] != 0) {
228 p = xdr_reserve_space(xdr, 16);
229 if (unlikely(p == NULL))
230 return htonl(NFS4ERR_RESOURCE);
231 *p++ = htonl(2);

--- 12 unchanged lines hidden (view full) ---

244 *p++ = htonl(0);
245 }
246 *savep = p;
247 return 0;
248}
249
250static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change)
251{
224
225 bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0);
226 bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1);
227 if (bm[1] != 0) {
228 p = xdr_reserve_space(xdr, 16);
229 if (unlikely(p == NULL))
230 return htonl(NFS4ERR_RESOURCE);
231 *p++ = htonl(2);

--- 12 unchanged lines hidden (view full) ---

244 *p++ = htonl(0);
245 }
246 *savep = p;
247 return 0;
248}
249
250static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change)
251{
252 uint32_t *p;
252 __be32 *p;
253
254 if (!(bitmap[0] & FATTR4_WORD0_CHANGE))
255 return 0;
256 p = xdr_reserve_space(xdr, 8);
257 if (unlikely(p == 0))
258 return htonl(NFS4ERR_RESOURCE);
259 p = xdr_encode_hyper(p, change);
260 return 0;
261}
262
263static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size)
264{
253
254 if (!(bitmap[0] & FATTR4_WORD0_CHANGE))
255 return 0;
256 p = xdr_reserve_space(xdr, 8);
257 if (unlikely(p == 0))
258 return htonl(NFS4ERR_RESOURCE);
259 p = xdr_encode_hyper(p, change);
260 return 0;
261}
262
263static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size)
264{
265 uint32_t *p;
265 __be32 *p;
266
267 if (!(bitmap[0] & FATTR4_WORD0_SIZE))
268 return 0;
269 p = xdr_reserve_space(xdr, 8);
270 if (unlikely(p == 0))
271 return htonl(NFS4ERR_RESOURCE);
272 p = xdr_encode_hyper(p, size);
273 return 0;
274}
275
276static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time)
277{
266
267 if (!(bitmap[0] & FATTR4_WORD0_SIZE))
268 return 0;
269 p = xdr_reserve_space(xdr, 8);
270 if (unlikely(p == 0))
271 return htonl(NFS4ERR_RESOURCE);
272 p = xdr_encode_hyper(p, size);
273 return 0;
274}
275
276static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time)
277{
278 uint32_t *p;
278 __be32 *p;
279
280 p = xdr_reserve_space(xdr, 12);
281 if (unlikely(p == 0))
282 return htonl(NFS4ERR_RESOURCE);
283 p = xdr_encode_hyper(p, time->tv_sec);
284 *p = htonl(time->tv_nsec);
285 return 0;
286}

--- 25 unchanged lines hidden (view full) ---

312 hdr->nops = xdr_reserve_space(xdr, 4);
313 if (unlikely(hdr->nops == NULL))
314 return htonl(NFS4ERR_RESOURCE);
315 return 0;
316}
317
318static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res)
319{
279
280 p = xdr_reserve_space(xdr, 12);
281 if (unlikely(p == 0))
282 return htonl(NFS4ERR_RESOURCE);
283 p = xdr_encode_hyper(p, time->tv_sec);
284 *p = htonl(time->tv_nsec);
285 return 0;
286}

--- 25 unchanged lines hidden (view full) ---

312 hdr->nops = xdr_reserve_space(xdr, 4);
313 if (unlikely(hdr->nops == NULL))
314 return htonl(NFS4ERR_RESOURCE);
315 return 0;
316}
317
318static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res)
319{
320 uint32_t *p;
320 __be32 *p;
321
322 p = xdr_reserve_space(xdr, 8);
323 if (unlikely(p == NULL))
324 return htonl(NFS4ERR_RESOURCE);
325 *p++ = htonl(op);
326 *p = res;
327 return 0;
328}
329
330static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res)
331{
321
322 p = xdr_reserve_space(xdr, 8);
323 if (unlikely(p == NULL))
324 return htonl(NFS4ERR_RESOURCE);
325 *p++ = htonl(op);
326 *p = res;
327 return 0;
328}
329
330static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res)
331{
332 uint32_t *savep = NULL;
332 __be32 *savep = NULL;
333 __be32 status = res->status;
334
335 if (unlikely(status != 0))
336 goto out;
337 status = encode_attr_bitmap(xdr, res->bitmap, &savep);
338 if (unlikely(status != 0))
339 goto out;
340 status = encode_attr_change(xdr, res->bitmap, res->change_attr);

--- 58 unchanged lines hidden (view full) ---

399/*
400 * Decode, process and encode a COMPOUND
401 */
402static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp)
403{
404 struct cb_compound_hdr_arg hdr_arg;
405 struct cb_compound_hdr_res hdr_res;
406 struct xdr_stream xdr_in, xdr_out;
333 __be32 status = res->status;
334
335 if (unlikely(status != 0))
336 goto out;
337 status = encode_attr_bitmap(xdr, res->bitmap, &savep);
338 if (unlikely(status != 0))
339 goto out;
340 status = encode_attr_change(xdr, res->bitmap, res->change_attr);

--- 58 unchanged lines hidden (view full) ---

399/*
400 * Decode, process and encode a COMPOUND
401 */
402static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp)
403{
404 struct cb_compound_hdr_arg hdr_arg;
405 struct cb_compound_hdr_res hdr_res;
406 struct xdr_stream xdr_in, xdr_out;
407 uint32_t *p;
407 __be32 *p;
408 __be32 status;
409 unsigned int nops = 1;
410
411 dprintk("%s: start\n", __FUNCTION__);
412
413 xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
414
408 __be32 status;
409 unsigned int nops = 1;
410
411 dprintk("%s: start\n", __FUNCTION__);
412
413 xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
414
415 p = (uint32_t*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
415 p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
416 xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
417
418 decode_compound_hdr_arg(&xdr_in, &hdr_arg);
419 hdr_res.taglen = hdr_arg.taglen;
420 hdr_res.tag = hdr_arg.tag;
421 hdr_res.nops = NULL;
422 encode_compound_hdr_res(&xdr_out, &hdr_res);
423

--- 61 unchanged lines hidden --- 		416 xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
417
418 decode_compound_hdr_arg(&xdr_in, &hdr_arg);
419 hdr_res.taglen = hdr_arg.taglen;
420 hdr_res.tag = hdr_arg.tag;
421 hdr_res.nops = NULL;
422 encode_compound_hdr_res(&xdr_out, &hdr_res);
423

--- 61 unchanged lines hidden ---