+++ /dev/null
-/*
- * Virtio 9p backend
- *
- * Copyright IBM, Corp. 2010
- *
- * Authors:
- * Anthony Liguori <aliguori@us.ibm.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- */
-
-#include <glib.h>
-#include <glib/gprintf.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <sys/time.h>
-#include <utime.h>
-#include <sys/uio.h>
-#include <string.h>
-#include <stdint.h>
-#include <errno.h>
-
-#include "qemu/compiler.h"
-#include "virtio-9p-marshal.h"
-#include "qemu/bswap.h"
-
-void v9fs_string_free(V9fsString *str)
-{
- g_free(str->data);
- str->data = NULL;
- str->size = 0;
-}
-
-void v9fs_string_null(V9fsString *str)
-{
- v9fs_string_free(str);
-}
-
-void GCC_FMT_ATTR(2, 3)
-v9fs_string_sprintf(V9fsString *str, const char *fmt, ...)
-{
- va_list ap;
-
- v9fs_string_free(str);
-
- va_start(ap, fmt);
- str->size = g_vasprintf(&str->data, fmt, ap);
- va_end(ap);
-}
-
-void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs)
-{
- v9fs_string_free(lhs);
- v9fs_string_sprintf(lhs, "%s", rhs->data);
-}
-
-
-static ssize_t v9fs_packunpack(void *addr, struct iovec *sg, int sg_count,
- size_t offset, size_t size, int pack)
-{
- int i = 0;
- size_t copied = 0;
- size_t req_size = size;
-
-
- for (i = 0; size && i < sg_count; i++) {
- size_t len;
- if (offset >= sg[i].iov_len) {
- /* skip this sg */
- offset -= sg[i].iov_len;
- continue;
- } else {
- len = MIN(sg[i].iov_len - offset, size);
- if (pack) {
- memcpy(sg[i].iov_base + offset, addr, len);
- } else {
- memcpy(addr, sg[i].iov_base + offset, len);
- }
- size -= len;
- copied += len;
- addr += len;
- if (size) {
- offset = 0;
- continue;
- }
- }
- }
- if (copied < req_size) {
- /*
- * We copied less that requested size. error out
- */
- return -ENOBUFS;
- }
- return copied;
-}
-
-static ssize_t v9fs_unpack(void *dst, struct iovec *out_sg, int out_num,
- size_t offset, size_t size)
-{
- return v9fs_packunpack(dst, out_sg, out_num, offset, size, 0);
-}
-
-ssize_t v9fs_pack(struct iovec *in_sg, int in_num, size_t offset,
- const void *src, size_t size)
-{
- return v9fs_packunpack((void *)src, in_sg, in_num, offset, size, 1);
-}
-
-ssize_t v9fs_unmarshal(struct iovec *out_sg, int out_num, size_t offset,
- int bswap, const char *fmt, ...)
-{
- int i;
- va_list ap;
- ssize_t copied = 0;
- size_t old_offset = offset;
-
- va_start(ap, fmt);
- for (i = 0; fmt[i]; i++) {
- switch (fmt[i]) {
- case 'b': {
- uint8_t *valp = va_arg(ap, uint8_t *);
- copied = v9fs_unpack(valp, out_sg, out_num, offset, sizeof(*valp));
- break;
- }
- case 'w': {
- uint16_t val, *valp;
- valp = va_arg(ap, uint16_t *);
- copied = v9fs_unpack(&val, out_sg, out_num, offset, sizeof(val));
- if (bswap) {
- *valp = le16_to_cpu(val);
- } else {
- *valp = val;
- }
- break;
- }
- case 'd': {
- uint32_t val, *valp;
- valp = va_arg(ap, uint32_t *);
- copied = v9fs_unpack(&val, out_sg, out_num, offset, sizeof(val));
- if (bswap) {
- *valp = le32_to_cpu(val);
- } else {
- *valp = val;
- }
- break;
- }
- case 'q': {
- uint64_t val, *valp;
- valp = va_arg(ap, uint64_t *);
- copied = v9fs_unpack(&val, out_sg, out_num, offset, sizeof(val));
- if (bswap) {
- *valp = le64_to_cpu(val);
- } else {
- *valp = val;
- }
- break;
- }
- case 's': {
- V9fsString *str = va_arg(ap, V9fsString *);
- copied = v9fs_unmarshal(out_sg, out_num, offset, bswap,
- "w", &str->size);
- if (copied > 0) {
- offset += copied;
- str->data = g_malloc(str->size + 1);
- copied = v9fs_unpack(str->data, out_sg, out_num, offset,
- str->size);
- if (copied > 0) {
- str->data[str->size] = 0;
- } else {
- v9fs_string_free(str);
- }
- }
- break;
- }
- case 'Q': {
- V9fsQID *qidp = va_arg(ap, V9fsQID *);
- copied = v9fs_unmarshal(out_sg, out_num, offset, bswap, "bdq",
- &qidp->type, &qidp->version, &qidp->path);
- break;
- }
- case 'S': {
- V9fsStat *statp = va_arg(ap, V9fsStat *);
- copied = v9fs_unmarshal(out_sg, out_num, offset, bswap,
- "wwdQdddqsssssddd",
- &statp->size, &statp->type, &statp->dev,
- &statp->qid, &statp->mode, &statp->atime,
- &statp->mtime, &statp->length,
- &statp->name, &statp->uid, &statp->gid,
- &statp->muid, &statp->extension,
- &statp->n_uid, &statp->n_gid,
- &statp->n_muid);
- break;
- }
- case 'I': {
- V9fsIattr *iattr = va_arg(ap, V9fsIattr *);
- copied = v9fs_unmarshal(out_sg, out_num, offset, bswap,
- "ddddqqqqq",
- &iattr->valid, &iattr->mode,
- &iattr->uid, &iattr->gid, &iattr->size,
- &iattr->atime_sec, &iattr->atime_nsec,
- &iattr->mtime_sec, &iattr->mtime_nsec);
- break;
- }
- default:
- break;
- }
- if (copied < 0) {
- va_end(ap);
- return copied;
- }
- offset += copied;
- }
- va_end(ap);
-
- return offset - old_offset;
-}
-
-ssize_t v9fs_marshal(struct iovec *in_sg, int in_num, size_t offset,
- int bswap, const char *fmt, ...)
-{
- int i;
- va_list ap;
- ssize_t copied = 0;
- size_t old_offset = offset;
-
- va_start(ap, fmt);
- for (i = 0; fmt[i]; i++) {
- switch (fmt[i]) {
- case 'b': {
- uint8_t val = va_arg(ap, int);
- copied = v9fs_pack(in_sg, in_num, offset, &val, sizeof(val));
- break;
- }
- case 'w': {
- uint16_t val;
- if (bswap) {
- cpu_to_le16w(&val, va_arg(ap, int));
- } else {
- val = va_arg(ap, int);
- }
- copied = v9fs_pack(in_sg, in_num, offset, &val, sizeof(val));
- break;
- }
- case 'd': {
- uint32_t val;
- if (bswap) {
- cpu_to_le32w(&val, va_arg(ap, uint32_t));
- } else {
- val = va_arg(ap, uint32_t);
- }
- copied = v9fs_pack(in_sg, in_num, offset, &val, sizeof(val));
- break;
- }
- case 'q': {
- uint64_t val;
- if (bswap) {
- cpu_to_le64w(&val, va_arg(ap, uint64_t));
- } else {
- val = va_arg(ap, uint64_t);
- }
- copied = v9fs_pack(in_sg, in_num, offset, &val, sizeof(val));
- break;
- }
- case 's': {
- V9fsString *str = va_arg(ap, V9fsString *);
- copied = v9fs_marshal(in_sg, in_num, offset, bswap,
- "w", str->size);
- if (copied > 0) {
- offset += copied;
- copied = v9fs_pack(in_sg, in_num, offset, str->data, str->size);
- }
- break;
- }
- case 'Q': {
- V9fsQID *qidp = va_arg(ap, V9fsQID *);
- copied = v9fs_marshal(in_sg, in_num, offset, bswap, "bdq",
- qidp->type, qidp->version, qidp->path);
- break;
- }
- case 'S': {
- V9fsStat *statp = va_arg(ap, V9fsStat *);
- copied = v9fs_marshal(in_sg, in_num, offset, bswap,
- "wwdQdddqsssssddd",
- statp->size, statp->type, statp->dev,
- &statp->qid, statp->mode, statp->atime,
- statp->mtime, statp->length, &statp->name,
- &statp->uid, &statp->gid, &statp->muid,
- &statp->extension, statp->n_uid,
- statp->n_gid, statp->n_muid);
- break;
- }
- case 'A': {
- V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *);
- copied = v9fs_marshal(in_sg, in_num, offset, bswap,
- "qQdddqqqqqqqqqqqqqqq",
- statp->st_result_mask,
- &statp->qid, statp->st_mode,
- statp->st_uid, statp->st_gid,
- statp->st_nlink, statp->st_rdev,
- statp->st_size, statp->st_blksize,
- statp->st_blocks, statp->st_atime_sec,
- statp->st_atime_nsec, statp->st_mtime_sec,
- statp->st_mtime_nsec, statp->st_ctime_sec,
- statp->st_ctime_nsec, statp->st_btime_sec,
- statp->st_btime_nsec, statp->st_gen,
- statp->st_data_version);
- break;
- }
- default:
- break;
- }
- if (copied < 0) {
- va_end(ap);
- return copied;
- }
- offset += copied;
- }
- va_end(ap);
-
- return offset - old_offset;
-}
Code Review / kvmfornfv.git / blobdiff