4 * Copyright IBM, Corp. 2010
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #include "qemu/osdep.h"
16 #include <glib/gprintf.h>
20 #include "9p-iov-marshal.h"
21 #include "qemu/bswap.h"
23 static ssize_t v9fs_packunpack(void *addr, struct iovec *sg, int sg_count,
24 size_t offset, size_t size, int pack)
28 size_t req_size = size;
31 for (i = 0; size && i < sg_count; i++) {
33 if (offset >= sg[i].iov_len) {
35 offset -= sg[i].iov_len;
38 len = MIN(sg[i].iov_len - offset, size);
40 memcpy(sg[i].iov_base + offset, addr, len);
42 memcpy(addr, sg[i].iov_base + offset, len);
53 if (copied < req_size) {
55 * We copied less that requested size. error out
62 static ssize_t v9fs_unpack(void *dst, struct iovec *out_sg, int out_num,
63 size_t offset, size_t size)
65 return v9fs_packunpack(dst, out_sg, out_num, offset, size, 0);
68 ssize_t v9fs_pack(struct iovec *in_sg, int in_num, size_t offset,
69 const void *src, size_t size)
71 return v9fs_packunpack((void *)src, in_sg, in_num, offset, size, 1);
74 ssize_t v9fs_iov_vunmarshal(struct iovec *out_sg, int out_num, size_t offset,
75 int bswap, const char *fmt, va_list ap)
79 size_t old_offset = offset;
81 for (i = 0; fmt[i]; i++) {
84 uint8_t *valp = va_arg(ap, uint8_t *);
85 copied = v9fs_unpack(valp, out_sg, out_num, offset, sizeof(*valp));
90 valp = va_arg(ap, uint16_t *);
91 copied = v9fs_unpack(&val, out_sg, out_num, offset, sizeof(val));
93 *valp = le16_to_cpu(val);
101 valp = va_arg(ap, uint32_t *);
102 copied = v9fs_unpack(&val, out_sg, out_num, offset, sizeof(val));
104 *valp = le32_to_cpu(val);
112 valp = va_arg(ap, uint64_t *);
113 copied = v9fs_unpack(&val, out_sg, out_num, offset, sizeof(val));
115 *valp = le64_to_cpu(val);
122 V9fsString *str = va_arg(ap, V9fsString *);
123 copied = v9fs_iov_unmarshal(out_sg, out_num, offset, bswap,
127 str->data = g_malloc(str->size + 1);
128 copied = v9fs_unpack(str->data, out_sg, out_num, offset,
131 str->data[str->size] = 0;
133 v9fs_string_free(str);
139 V9fsQID *qidp = va_arg(ap, V9fsQID *);
140 copied = v9fs_iov_unmarshal(out_sg, out_num, offset, bswap,
141 "bdq", &qidp->type, &qidp->version,
146 V9fsStat *statp = va_arg(ap, V9fsStat *);
147 copied = v9fs_iov_unmarshal(out_sg, out_num, offset, bswap,
149 &statp->size, &statp->type,
150 &statp->dev, &statp->qid,
151 &statp->mode, &statp->atime,
152 &statp->mtime, &statp->length,
153 &statp->name, &statp->uid,
154 &statp->gid, &statp->muid,
156 &statp->n_uid, &statp->n_gid,
161 V9fsIattr *iattr = va_arg(ap, V9fsIattr *);
162 copied = v9fs_iov_unmarshal(out_sg, out_num, offset, bswap,
164 &iattr->valid, &iattr->mode,
165 &iattr->uid, &iattr->gid,
166 &iattr->size, &iattr->atime_sec,
181 return offset - old_offset;
184 ssize_t v9fs_iov_unmarshal(struct iovec *out_sg, int out_num, size_t offset,
185 int bswap, const char *fmt, ...)
191 ret = v9fs_iov_vunmarshal(out_sg, out_num, offset, bswap, fmt, ap);
197 ssize_t v9fs_iov_vmarshal(struct iovec *in_sg, int in_num, size_t offset,
198 int bswap, const char *fmt, va_list ap)
202 size_t old_offset = offset;
204 for (i = 0; fmt[i]; i++) {
207 uint8_t val = va_arg(ap, int);
208 copied = v9fs_pack(in_sg, in_num, offset, &val, sizeof(val));
214 cpu_to_le16w(&val, va_arg(ap, int));
216 val = va_arg(ap, int);
218 copied = v9fs_pack(in_sg, in_num, offset, &val, sizeof(val));
224 cpu_to_le32w(&val, va_arg(ap, uint32_t));
226 val = va_arg(ap, uint32_t);
228 copied = v9fs_pack(in_sg, in_num, offset, &val, sizeof(val));
234 cpu_to_le64w(&val, va_arg(ap, uint64_t));
236 val = va_arg(ap, uint64_t);
238 copied = v9fs_pack(in_sg, in_num, offset, &val, sizeof(val));
242 V9fsString *str = va_arg(ap, V9fsString *);
243 copied = v9fs_iov_marshal(in_sg, in_num, offset, bswap,
247 copied = v9fs_pack(in_sg, in_num, offset, str->data, str->size);
252 V9fsQID *qidp = va_arg(ap, V9fsQID *);
253 copied = v9fs_iov_marshal(in_sg, in_num, offset, bswap, "bdq",
254 qidp->type, qidp->version,
259 V9fsStat *statp = va_arg(ap, V9fsStat *);
260 copied = v9fs_iov_marshal(in_sg, in_num, offset, bswap,
262 statp->size, statp->type, statp->dev,
263 &statp->qid, statp->mode, statp->atime,
264 statp->mtime, statp->length,
266 &statp->uid, &statp->gid, &statp->muid,
267 &statp->extension, statp->n_uid,
268 statp->n_gid, statp->n_muid);
272 V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *);
273 copied = v9fs_iov_marshal(in_sg, in_num, offset, bswap,
274 "qQdddqqqqqqqqqqqqqqq",
275 statp->st_result_mask,
276 &statp->qid, statp->st_mode,
277 statp->st_uid, statp->st_gid,
278 statp->st_nlink, statp->st_rdev,
279 statp->st_size, statp->st_blksize,
280 statp->st_blocks, statp->st_atime_sec,
281 statp->st_atime_nsec,
283 statp->st_mtime_nsec,
285 statp->st_ctime_nsec,
287 statp->st_btime_nsec, statp->st_gen,
288 statp->st_data_version);
300 return offset - old_offset;
303 ssize_t v9fs_iov_marshal(struct iovec *in_sg, int in_num, size_t offset,
304 int bswap, const char *fmt, ...)
310 ret = v9fs_iov_vmarshal(in_sg, in_num, offset, bswap, fmt, ap);