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/*
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* Virtio 9p backend
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "virtio.h" |
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#include "pc.h" |
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#include "qemu_socket.h" |
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#include "virtio-9p.h" |
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#include "fsdev/qemu-fsdev.h" |
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#include "virtio-9p-debug.h" |
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|
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int dotu = 1; |
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int debug_9p_pdu;
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|
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static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
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{
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return s->ops->lstat(&s->ctx, path->data, stbuf);
|
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} |
| 28 |
|
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static int v9fs_do_setuid(V9fsState *s, uid_t uid) |
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{
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return s->ops->setuid(&s->ctx, uid);
|
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} |
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|
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static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
|
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{
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ssize_t len; |
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|
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buf->data = qemu_malloc(1024);
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|
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len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1); |
| 41 |
if (len > -1) { |
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buf->size = len; |
| 43 |
buf->data[len] = 0;
|
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} |
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|
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return len;
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} |
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|
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static int v9fs_do_close(V9fsState *s, int fd) |
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{
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return s->ops->close(&s->ctx, fd);
|
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} |
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|
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static int v9fs_do_closedir(V9fsState *s, DIR *dir) |
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{
|
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return s->ops->closedir(&s->ctx, dir);
|
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} |
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|
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static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
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{
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return s->ops->open(&s->ctx, path->data, flags);
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} |
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|
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static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path)
|
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{
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return s->ops->opendir(&s->ctx, path->data);
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} |
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|
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static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
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{
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return s->ops->rewinddir(&s->ctx, dir);
|
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} |
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|
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static off_t v9fs_do_telldir(V9fsState *s, DIR *dir)
|
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{
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return s->ops->telldir(&s->ctx, dir);
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} |
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|
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static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir) |
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{
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return s->ops->readdir(&s->ctx, dir);
|
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} |
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|
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static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
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{
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return s->ops->seekdir(&s->ctx, dir, off);
|
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} |
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|
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static int v9fs_do_readv(V9fsState *s, int fd, const struct iovec *iov, |
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int iovcnt)
|
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{
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return s->ops->readv(&s->ctx, fd, iov, iovcnt);
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} |
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static off_t v9fs_do_lseek(V9fsState *s, int fd, off_t offset, int whence) |
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{
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return s->ops->lseek(&s->ctx, fd, offset, whence);
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} |
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|
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static int v9fs_do_writev(V9fsState *s, int fd, const struct iovec *iov, |
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int iovcnt)
|
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{
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return s->ops->writev(&s->ctx, fd, iov, iovcnt);
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} |
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|
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static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
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{
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return s->ops->chmod(&s->ctx, path->data, mode);
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} |
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static int v9fs_do_mknod(V9fsState *s, V9fsString *path, mode_t mode, dev_t dev) |
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{
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return s->ops->mknod(&s->ctx, path->data, mode, dev);
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} |
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static int v9fs_do_mksock(V9fsState *s, V9fsString *path) |
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{
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return s->ops->mksock(&s->ctx, path->data);
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} |
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static int v9fs_do_mkdir(V9fsState *s, V9fsString *path, mode_t mode) |
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{
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return s->ops->mkdir(&s->ctx, path->data, mode);
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} |
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static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) |
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{
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return s->ops->fstat(&s->ctx, fd, stbuf);
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} |
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static int v9fs_do_open2(V9fsState *s, V9fsString *path, int flags, mode_t mode) |
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{
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return s->ops->open2(&s->ctx, path->data, flags, mode);
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} |
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static int v9fs_do_symlink(V9fsState *s, V9fsString *oldpath, |
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V9fsString *newpath) |
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{
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return s->ops->symlink(&s->ctx, oldpath->data, newpath->data);
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} |
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static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) |
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{
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return s->ops->link(&s->ctx, oldpath->data, newpath->data);
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} |
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static void v9fs_string_init(V9fsString *str) |
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{
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str->data = NULL;
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str->size = 0;
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} |
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static void v9fs_string_free(V9fsString *str) |
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{
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qemu_free(str->data); |
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str->data = NULL;
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str->size = 0;
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} |
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static void v9fs_string_null(V9fsString *str) |
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{
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v9fs_string_free(str); |
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} |
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static int number_to_string(void *arg, char type) |
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{
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unsigned int ret = 0; |
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switch (type) {
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case 'u': { |
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unsigned int num = *(unsigned int *)arg; |
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do {
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ret++; |
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num = num/10;
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} while (num);
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break;
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} |
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default:
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printf("Number_to_string: Unknown number format\n");
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return -1; |
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} |
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return ret;
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} |
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static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) |
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{
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va_list ap2; |
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char *iter = (char *)fmt; |
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int len = 0; |
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int nr_args = 0; |
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char *arg_char_ptr;
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unsigned int arg_uint; |
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/* Find the number of %'s that denotes an argument */
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for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
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nr_args++; |
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iter++; |
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} |
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len = strlen(fmt) - 2*nr_args;
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if (!nr_args) {
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goto alloc_print;
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} |
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va_copy(ap2, ap); |
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iter = (char *)fmt;
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/* Now parse the format string */
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for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { |
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iter++; |
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switch (*iter) {
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case 'u': |
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arg_uint = va_arg(ap2, unsigned int); |
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len += number_to_string((void *)&arg_uint, 'u'); |
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break;
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case 's': |
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arg_char_ptr = va_arg(ap2, char *);
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len += strlen(arg_char_ptr); |
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break;
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case 'c': |
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len += 1;
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break;
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default:
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fprintf(stderr, |
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"v9fs_string_alloc_printf:Incorrect format %c", *iter);
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return -1; |
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} |
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iter++; |
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} |
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alloc_print:
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*strp = qemu_malloc((len + 1) * sizeof(**strp)); |
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return vsprintf(*strp, fmt, ap);
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} |
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static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) |
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{
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va_list ap; |
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int err;
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v9fs_string_free(str); |
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va_start(ap, fmt); |
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err = v9fs_string_alloc_printf(&str->data, fmt, ap); |
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BUG_ON(err == -1);
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va_end(ap); |
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str->size = err; |
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} |
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|
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static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) |
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{
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v9fs_string_free(lhs); |
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v9fs_string_sprintf(lhs, "%s", rhs->data);
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} |
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static size_t v9fs_string_size(V9fsString *str)
|
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{
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return str->size;
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} |
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static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid)
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{
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V9fsFidState *f; |
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for (f = s->fid_list; f; f = f->next) {
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if (f->fid == fid) {
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v9fs_do_setuid(s, f->uid); |
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return f;
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} |
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} |
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return NULL; |
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} |
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static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid)
|
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{
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V9fsFidState *f; |
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f = lookup_fid(s, fid); |
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if (f) {
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return NULL; |
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} |
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f = qemu_mallocz(sizeof(V9fsFidState));
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f->fid = fid; |
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f->fd = -1;
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f->dir = NULL;
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|
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f->next = s->fid_list; |
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s->fid_list = f; |
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|
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return f;
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} |
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|
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static int free_fid(V9fsState *s, int32_t fid) |
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{
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V9fsFidState **fidpp, *fidp; |
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|
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for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) {
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if ((*fidpp)->fid == fid) {
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break;
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} |
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} |
| 311 |
|
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if (*fidpp == NULL) { |
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return -ENOENT;
|
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} |
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|
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fidp = *fidpp; |
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*fidpp = fidp->next; |
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|
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if (fidp->fd != -1) { |
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v9fs_do_close(s, fidp->fd); |
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} |
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if (fidp->dir) {
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v9fs_do_closedir(s, fidp->dir); |
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} |
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v9fs_string_free(&fidp->path); |
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qemu_free(fidp); |
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|
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return 0; |
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} |
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|
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#define P9_QID_TYPE_DIR 0x80 |
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#define P9_QID_TYPE_SYMLINK 0x02 |
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|
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#define P9_STAT_MODE_DIR 0x80000000 |
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#define P9_STAT_MODE_APPEND 0x40000000 |
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#define P9_STAT_MODE_EXCL 0x20000000 |
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#define P9_STAT_MODE_MOUNT 0x10000000 |
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#define P9_STAT_MODE_AUTH 0x08000000 |
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#define P9_STAT_MODE_TMP 0x04000000 |
| 340 |
#define P9_STAT_MODE_SYMLINK 0x02000000 |
| 341 |
#define P9_STAT_MODE_LINK 0x01000000 |
| 342 |
#define P9_STAT_MODE_DEVICE 0x00800000 |
| 343 |
#define P9_STAT_MODE_NAMED_PIPE 0x00200000 |
| 344 |
#define P9_STAT_MODE_SOCKET 0x00100000 |
| 345 |
#define P9_STAT_MODE_SETUID 0x00080000 |
| 346 |
#define P9_STAT_MODE_SETGID 0x00040000 |
| 347 |
#define P9_STAT_MODE_SETVTX 0x00010000 |
| 348 |
|
| 349 |
#define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \
|
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P9_STAT_MODE_SYMLINK | \ |
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P9_STAT_MODE_LINK | \ |
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P9_STAT_MODE_DEVICE | \ |
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P9_STAT_MODE_NAMED_PIPE | \ |
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P9_STAT_MODE_SOCKET) |
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|
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/* This is the algorithm from ufs in spfs */
|
| 357 |
static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) |
| 358 |
{
|
| 359 |
size_t size; |
| 360 |
|
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size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); |
| 362 |
memcpy(&qidp->path, &stbuf->st_ino, size); |
| 363 |
qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
|
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qidp->type = 0;
|
| 365 |
if (S_ISDIR(stbuf->st_mode)) {
|
| 366 |
qidp->type |= P9_QID_TYPE_DIR; |
| 367 |
} |
| 368 |
if (S_ISLNK(stbuf->st_mode)) {
|
| 369 |
qidp->type |= P9_QID_TYPE_SYMLINK; |
| 370 |
} |
| 371 |
} |
| 372 |
|
| 373 |
static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) |
| 374 |
{
|
| 375 |
struct stat stbuf;
|
| 376 |
int err;
|
| 377 |
|
| 378 |
err = v9fs_do_lstat(s, &fidp->path, &stbuf); |
| 379 |
if (err) {
|
| 380 |
return err;
|
| 381 |
} |
| 382 |
|
| 383 |
stat_to_qid(&stbuf, qidp); |
| 384 |
return 0; |
| 385 |
} |
| 386 |
|
| 387 |
static V9fsPDU *alloc_pdu(V9fsState *s)
|
| 388 |
{
|
| 389 |
V9fsPDU *pdu = NULL;
|
| 390 |
|
| 391 |
if (!QLIST_EMPTY(&s->free_list)) {
|
| 392 |
pdu = QLIST_FIRST(&s->free_list); |
| 393 |
QLIST_REMOVE(pdu, next); |
| 394 |
} |
| 395 |
return pdu;
|
| 396 |
} |
| 397 |
|
| 398 |
static void free_pdu(V9fsState *s, V9fsPDU *pdu) |
| 399 |
{
|
| 400 |
if (pdu) {
|
| 401 |
QLIST_INSERT_HEAD(&s->free_list, pdu, next); |
| 402 |
} |
| 403 |
} |
| 404 |
|
| 405 |
size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, |
| 406 |
size_t offset, size_t size, int pack)
|
| 407 |
{
|
| 408 |
int i = 0; |
| 409 |
size_t copied = 0;
|
| 410 |
|
| 411 |
for (i = 0; size && i < sg_count; i++) { |
| 412 |
size_t len; |
| 413 |
if (offset >= sg[i].iov_len) {
|
| 414 |
/* skip this sg */
|
| 415 |
offset -= sg[i].iov_len; |
| 416 |
continue;
|
| 417 |
} else {
|
| 418 |
len = MIN(sg[i].iov_len - offset, size); |
| 419 |
if (pack) {
|
| 420 |
memcpy(sg[i].iov_base + offset, addr, len); |
| 421 |
} else {
|
| 422 |
memcpy(addr, sg[i].iov_base + offset, len); |
| 423 |
} |
| 424 |
size -= len; |
| 425 |
copied += len; |
| 426 |
addr += len; |
| 427 |
if (size) {
|
| 428 |
offset = 0;
|
| 429 |
continue;
|
| 430 |
} |
| 431 |
} |
| 432 |
} |
| 433 |
|
| 434 |
return copied;
|
| 435 |
} |
| 436 |
|
| 437 |
static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
| 438 |
{
|
| 439 |
return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
|
| 440 |
offset, size, 0);
|
| 441 |
} |
| 442 |
|
| 443 |
static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, |
| 444 |
size_t size) |
| 445 |
{
|
| 446 |
return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, |
| 447 |
offset, size, 1);
|
| 448 |
} |
| 449 |
|
| 450 |
static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) |
| 451 |
{
|
| 452 |
size_t pos = 0;
|
| 453 |
int i, j;
|
| 454 |
struct iovec *src_sg;
|
| 455 |
unsigned int num; |
| 456 |
|
| 457 |
if (rx) {
|
| 458 |
src_sg = pdu->elem.in_sg; |
| 459 |
num = pdu->elem.in_num; |
| 460 |
} else {
|
| 461 |
src_sg = pdu->elem.out_sg; |
| 462 |
num = pdu->elem.out_num; |
| 463 |
} |
| 464 |
|
| 465 |
j = 0;
|
| 466 |
for (i = 0; i < num; i++) { |
| 467 |
if (offset <= pos) {
|
| 468 |
sg[j].iov_base = src_sg[i].iov_base; |
| 469 |
sg[j].iov_len = src_sg[i].iov_len; |
| 470 |
j++; |
| 471 |
} else if (offset < (src_sg[i].iov_len + pos)) { |
| 472 |
sg[j].iov_base = src_sg[i].iov_base; |
| 473 |
sg[j].iov_len = src_sg[i].iov_len; |
| 474 |
sg[j].iov_base += (offset - pos); |
| 475 |
sg[j].iov_len -= (offset - pos); |
| 476 |
j++; |
| 477 |
} |
| 478 |
pos += src_sg[i].iov_len; |
| 479 |
} |
| 480 |
|
| 481 |
return j;
|
| 482 |
} |
| 483 |
|
| 484 |
static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
| 485 |
{
|
| 486 |
size_t old_offset = offset; |
| 487 |
va_list ap; |
| 488 |
int i;
|
| 489 |
|
| 490 |
va_start(ap, fmt); |
| 491 |
for (i = 0; fmt[i]; i++) { |
| 492 |
switch (fmt[i]) {
|
| 493 |
case 'b': { |
| 494 |
uint8_t *valp = va_arg(ap, uint8_t *); |
| 495 |
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
| 496 |
break;
|
| 497 |
} |
| 498 |
case 'w': { |
| 499 |
uint16_t val, *valp; |
| 500 |
valp = va_arg(ap, uint16_t *); |
| 501 |
val = le16_to_cpupu(valp); |
| 502 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
| 503 |
*valp = val; |
| 504 |
break;
|
| 505 |
} |
| 506 |
case 'd': { |
| 507 |
uint32_t val, *valp; |
| 508 |
valp = va_arg(ap, uint32_t *); |
| 509 |
val = le32_to_cpupu(valp); |
| 510 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
| 511 |
*valp = val; |
| 512 |
break;
|
| 513 |
} |
| 514 |
case 'q': { |
| 515 |
uint64_t val, *valp; |
| 516 |
valp = va_arg(ap, uint64_t *); |
| 517 |
val = le64_to_cpup(valp); |
| 518 |
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
| 519 |
*valp = val; |
| 520 |
break;
|
| 521 |
} |
| 522 |
case 'v': { |
| 523 |
struct iovec *iov = va_arg(ap, struct iovec *); |
| 524 |
int *iovcnt = va_arg(ap, int *); |
| 525 |
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
| 526 |
break;
|
| 527 |
} |
| 528 |
case 's': { |
| 529 |
V9fsString *str = va_arg(ap, V9fsString *); |
| 530 |
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
| 531 |
/* FIXME: sanity check str->size */
|
| 532 |
str->data = qemu_malloc(str->size + 1);
|
| 533 |
offset += pdu_unpack(str->data, pdu, offset, str->size); |
| 534 |
str->data[str->size] = 0;
|
| 535 |
break;
|
| 536 |
} |
| 537 |
case 'Q': { |
| 538 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
| 539 |
offset += pdu_unmarshal(pdu, offset, "bdq",
|
| 540 |
&qidp->type, &qidp->version, &qidp->path); |
| 541 |
break;
|
| 542 |
} |
| 543 |
case 'S': { |
| 544 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
| 545 |
offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd",
|
| 546 |
&statp->size, &statp->type, &statp->dev, |
| 547 |
&statp->qid, &statp->mode, &statp->atime, |
| 548 |
&statp->mtime, &statp->length, |
| 549 |
&statp->name, &statp->uid, &statp->gid, |
| 550 |
&statp->muid, &statp->extension, |
| 551 |
&statp->n_uid, &statp->n_gid, |
| 552 |
&statp->n_muid); |
| 553 |
break;
|
| 554 |
} |
| 555 |
default:
|
| 556 |
break;
|
| 557 |
} |
| 558 |
} |
| 559 |
|
| 560 |
va_end(ap); |
| 561 |
|
| 562 |
return offset - old_offset;
|
| 563 |
} |
| 564 |
|
| 565 |
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) |
| 566 |
{
|
| 567 |
size_t old_offset = offset; |
| 568 |
va_list ap; |
| 569 |
int i;
|
| 570 |
|
| 571 |
va_start(ap, fmt); |
| 572 |
for (i = 0; fmt[i]; i++) { |
| 573 |
switch (fmt[i]) {
|
| 574 |
case 'b': { |
| 575 |
uint8_t val = va_arg(ap, int);
|
| 576 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
| 577 |
break;
|
| 578 |
} |
| 579 |
case 'w': { |
| 580 |
uint16_t val; |
| 581 |
cpu_to_le16w(&val, va_arg(ap, int));
|
| 582 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
| 583 |
break;
|
| 584 |
} |
| 585 |
case 'd': { |
| 586 |
uint32_t val; |
| 587 |
cpu_to_le32w(&val, va_arg(ap, uint32_t)); |
| 588 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
| 589 |
break;
|
| 590 |
} |
| 591 |
case 'q': { |
| 592 |
uint64_t val; |
| 593 |
cpu_to_le64w(&val, va_arg(ap, uint64_t)); |
| 594 |
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
| 595 |
break;
|
| 596 |
} |
| 597 |
case 'v': { |
| 598 |
struct iovec *iov = va_arg(ap, struct iovec *); |
| 599 |
int *iovcnt = va_arg(ap, int *); |
| 600 |
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
| 601 |
break;
|
| 602 |
} |
| 603 |
case 's': { |
| 604 |
V9fsString *str = va_arg(ap, V9fsString *); |
| 605 |
offset += pdu_marshal(pdu, offset, "w", str->size);
|
| 606 |
offset += pdu_pack(pdu, offset, str->data, str->size); |
| 607 |
break;
|
| 608 |
} |
| 609 |
case 'Q': { |
| 610 |
V9fsQID *qidp = va_arg(ap, V9fsQID *); |
| 611 |
offset += pdu_marshal(pdu, offset, "bdq",
|
| 612 |
qidp->type, qidp->version, qidp->path); |
| 613 |
break;
|
| 614 |
} |
| 615 |
case 'S': { |
| 616 |
V9fsStat *statp = va_arg(ap, V9fsStat *); |
| 617 |
offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd",
|
| 618 |
statp->size, statp->type, statp->dev, |
| 619 |
&statp->qid, statp->mode, statp->atime, |
| 620 |
statp->mtime, statp->length, &statp->name, |
| 621 |
&statp->uid, &statp->gid, &statp->muid, |
| 622 |
&statp->extension, statp->n_uid, |
| 623 |
statp->n_gid, statp->n_muid); |
| 624 |
break;
|
| 625 |
} |
| 626 |
default:
|
| 627 |
break;
|
| 628 |
} |
| 629 |
} |
| 630 |
va_end(ap); |
| 631 |
|
| 632 |
return offset - old_offset;
|
| 633 |
} |
| 634 |
|
| 635 |
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) |
| 636 |
{
|
| 637 |
int8_t id = pdu->id + 1; /* Response */ |
| 638 |
|
| 639 |
if (len < 0) { |
| 640 |
V9fsString str; |
| 641 |
int err = -len;
|
| 642 |
|
| 643 |
str.data = strerror(err); |
| 644 |
str.size = strlen(str.data); |
| 645 |
|
| 646 |
len = 7;
|
| 647 |
len += pdu_marshal(pdu, len, "s", &str);
|
| 648 |
if (dotu) {
|
| 649 |
len += pdu_marshal(pdu, len, "d", err);
|
| 650 |
} |
| 651 |
|
| 652 |
id = P9_RERROR; |
| 653 |
} |
| 654 |
|
| 655 |
/* fill out the header */
|
| 656 |
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); |
| 657 |
|
| 658 |
/* keep these in sync */
|
| 659 |
pdu->size = len; |
| 660 |
pdu->id = id; |
| 661 |
|
| 662 |
/* push onto queue and notify */
|
| 663 |
virtqueue_push(s->vq, &pdu->elem, len); |
| 664 |
|
| 665 |
/* FIXME: we should batch these completions */
|
| 666 |
virtio_notify(&s->vdev, s->vq); |
| 667 |
|
| 668 |
free_pdu(s, pdu); |
| 669 |
} |
| 670 |
|
| 671 |
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
| 672 |
{
|
| 673 |
mode_t ret; |
| 674 |
|
| 675 |
ret = mode & 0777;
|
| 676 |
if (mode & P9_STAT_MODE_DIR) {
|
| 677 |
ret |= S_IFDIR; |
| 678 |
} |
| 679 |
|
| 680 |
if (dotu) {
|
| 681 |
if (mode & P9_STAT_MODE_SYMLINK) {
|
| 682 |
ret |= S_IFLNK; |
| 683 |
} |
| 684 |
if (mode & P9_STAT_MODE_SOCKET) {
|
| 685 |
ret |= S_IFSOCK; |
| 686 |
} |
| 687 |
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
| 688 |
ret |= S_IFIFO; |
| 689 |
} |
| 690 |
if (mode & P9_STAT_MODE_DEVICE) {
|
| 691 |
if (extension && extension->data[0] == 'c') { |
| 692 |
ret |= S_IFCHR; |
| 693 |
} else {
|
| 694 |
ret |= S_IFBLK; |
| 695 |
} |
| 696 |
} |
| 697 |
} |
| 698 |
|
| 699 |
if (!(ret&~0777)) { |
| 700 |
ret |= S_IFREG; |
| 701 |
} |
| 702 |
|
| 703 |
if (mode & P9_STAT_MODE_SETUID) {
|
| 704 |
ret |= S_ISUID; |
| 705 |
} |
| 706 |
if (mode & P9_STAT_MODE_SETGID) {
|
| 707 |
ret |= S_ISGID; |
| 708 |
} |
| 709 |
if (mode & P9_STAT_MODE_SETVTX) {
|
| 710 |
ret |= S_ISVTX; |
| 711 |
} |
| 712 |
|
| 713 |
return ret;
|
| 714 |
} |
| 715 |
|
| 716 |
static int donttouch_stat(V9fsStat *stat) |
| 717 |
{
|
| 718 |
if (stat->type == -1 && |
| 719 |
stat->dev == -1 &&
|
| 720 |
stat->qid.type == -1 &&
|
| 721 |
stat->qid.version == -1 &&
|
| 722 |
stat->qid.path == -1 &&
|
| 723 |
stat->mode == -1 &&
|
| 724 |
stat->atime == -1 &&
|
| 725 |
stat->mtime == -1 &&
|
| 726 |
stat->length == -1 &&
|
| 727 |
!stat->name.size && |
| 728 |
!stat->uid.size && |
| 729 |
!stat->gid.size && |
| 730 |
!stat->muid.size && |
| 731 |
stat->n_uid == -1 &&
|
| 732 |
stat->n_gid == -1 &&
|
| 733 |
stat->n_muid == -1) {
|
| 734 |
return 1; |
| 735 |
} |
| 736 |
|
| 737 |
return 0; |
| 738 |
} |
| 739 |
|
| 740 |
static void v9fs_stat_free(V9fsStat *stat) |
| 741 |
{
|
| 742 |
v9fs_string_free(&stat->name); |
| 743 |
v9fs_string_free(&stat->uid); |
| 744 |
v9fs_string_free(&stat->gid); |
| 745 |
v9fs_string_free(&stat->muid); |
| 746 |
v9fs_string_free(&stat->extension); |
| 747 |
} |
| 748 |
|
| 749 |
static uint32_t stat_to_v9mode(const struct stat *stbuf) |
| 750 |
{
|
| 751 |
uint32_t mode; |
| 752 |
|
| 753 |
mode = stbuf->st_mode & 0777;
|
| 754 |
if (S_ISDIR(stbuf->st_mode)) {
|
| 755 |
mode |= P9_STAT_MODE_DIR; |
| 756 |
} |
| 757 |
|
| 758 |
if (dotu) {
|
| 759 |
if (S_ISLNK(stbuf->st_mode)) {
|
| 760 |
mode |= P9_STAT_MODE_SYMLINK; |
| 761 |
} |
| 762 |
|
| 763 |
if (S_ISSOCK(stbuf->st_mode)) {
|
| 764 |
mode |= P9_STAT_MODE_SOCKET; |
| 765 |
} |
| 766 |
|
| 767 |
if (S_ISFIFO(stbuf->st_mode)) {
|
| 768 |
mode |= P9_STAT_MODE_NAMED_PIPE; |
| 769 |
} |
| 770 |
|
| 771 |
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
| 772 |
mode |= P9_STAT_MODE_DEVICE; |
| 773 |
} |
| 774 |
|
| 775 |
if (stbuf->st_mode & S_ISUID) {
|
| 776 |
mode |= P9_STAT_MODE_SETUID; |
| 777 |
} |
| 778 |
|
| 779 |
if (stbuf->st_mode & S_ISGID) {
|
| 780 |
mode |= P9_STAT_MODE_SETGID; |
| 781 |
} |
| 782 |
|
| 783 |
if (stbuf->st_mode & S_ISVTX) {
|
| 784 |
mode |= P9_STAT_MODE_SETVTX; |
| 785 |
} |
| 786 |
} |
| 787 |
|
| 788 |
return mode;
|
| 789 |
} |
| 790 |
|
| 791 |
static int stat_to_v9stat(V9fsState *s, V9fsString *name, |
| 792 |
const struct stat *stbuf, |
| 793 |
V9fsStat *v9stat) |
| 794 |
{
|
| 795 |
int err;
|
| 796 |
const char *str; |
| 797 |
|
| 798 |
memset(v9stat, 0, sizeof(*v9stat)); |
| 799 |
|
| 800 |
stat_to_qid(stbuf, &v9stat->qid); |
| 801 |
v9stat->mode = stat_to_v9mode(stbuf); |
| 802 |
v9stat->atime = stbuf->st_atime; |
| 803 |
v9stat->mtime = stbuf->st_mtime; |
| 804 |
v9stat->length = stbuf->st_size; |
| 805 |
|
| 806 |
v9fs_string_null(&v9stat->uid); |
| 807 |
v9fs_string_null(&v9stat->gid); |
| 808 |
v9fs_string_null(&v9stat->muid); |
| 809 |
|
| 810 |
if (dotu) {
|
| 811 |
v9stat->n_uid = stbuf->st_uid; |
| 812 |
v9stat->n_gid = stbuf->st_gid; |
| 813 |
v9stat->n_muid = 0;
|
| 814 |
|
| 815 |
v9fs_string_null(&v9stat->extension); |
| 816 |
|
| 817 |
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
| 818 |
err = v9fs_do_readlink(s, name, &v9stat->extension); |
| 819 |
if (err == -1) { |
| 820 |
err = -errno; |
| 821 |
return err;
|
| 822 |
} |
| 823 |
v9stat->extension.data[err] = 0;
|
| 824 |
v9stat->extension.size = err; |
| 825 |
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
| 826 |
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
| 827 |
S_ISCHR(stbuf->st_mode) ? 'c' : 'b', |
| 828 |
major(stbuf->st_rdev), minor(stbuf->st_rdev)); |
| 829 |
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { |
| 830 |
v9fs_string_sprintf(&v9stat->extension, "%s %u",
|
| 831 |
"HARDLINKCOUNT", stbuf->st_nlink);
|
| 832 |
} |
| 833 |
} |
| 834 |
|
| 835 |
str = strrchr(name->data, '/');
|
| 836 |
if (str) {
|
| 837 |
str += 1;
|
| 838 |
} else {
|
| 839 |
str = name->data; |
| 840 |
} |
| 841 |
|
| 842 |
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
| 843 |
|
| 844 |
v9stat->size = 61 +
|
| 845 |
v9fs_string_size(&v9stat->name) + |
| 846 |
v9fs_string_size(&v9stat->uid) + |
| 847 |
v9fs_string_size(&v9stat->gid) + |
| 848 |
v9fs_string_size(&v9stat->muid) + |
| 849 |
v9fs_string_size(&v9stat->extension); |
| 850 |
return 0; |
| 851 |
} |
| 852 |
|
| 853 |
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
| 854 |
{
|
| 855 |
while (len && *iovcnt) {
|
| 856 |
if (len < sg->iov_len) {
|
| 857 |
sg->iov_len -= len; |
| 858 |
sg->iov_base += len; |
| 859 |
len = 0;
|
| 860 |
} else {
|
| 861 |
len -= sg->iov_len; |
| 862 |
sg++; |
| 863 |
*iovcnt -= 1;
|
| 864 |
} |
| 865 |
} |
| 866 |
|
| 867 |
return sg;
|
| 868 |
} |
| 869 |
|
| 870 |
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) |
| 871 |
{
|
| 872 |
int i;
|
| 873 |
int total = 0; |
| 874 |
|
| 875 |
for (i = 0; i < *cnt; i++) { |
| 876 |
if ((total + sg[i].iov_len) > cap) {
|
| 877 |
sg[i].iov_len -= ((total + sg[i].iov_len) - cap); |
| 878 |
i++; |
| 879 |
break;
|
| 880 |
} |
| 881 |
total += sg[i].iov_len; |
| 882 |
} |
| 883 |
|
| 884 |
*cnt = i; |
| 885 |
|
| 886 |
return sg;
|
| 887 |
} |
| 888 |
|
| 889 |
static void print_sg(struct iovec *sg, int cnt) |
| 890 |
{
|
| 891 |
int i;
|
| 892 |
|
| 893 |
printf("sg[%d]: {", cnt);
|
| 894 |
for (i = 0; i < cnt; i++) { |
| 895 |
if (i) {
|
| 896 |
printf(", ");
|
| 897 |
} |
| 898 |
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
| 899 |
} |
| 900 |
printf("}\n");
|
| 901 |
} |
| 902 |
|
| 903 |
static void v9fs_dummy(V9fsState *s, V9fsPDU *pdu) |
| 904 |
{
|
| 905 |
/* Note: The following have been added to prevent GCC from complaining
|
| 906 |
* They will be removed in the subsequent patches */
|
| 907 |
(void)pdu_unmarshal;
|
| 908 |
(void) complete_pdu;
|
| 909 |
(void) v9fs_string_init;
|
| 910 |
(void) v9fs_string_free;
|
| 911 |
(void) v9fs_string_null;
|
| 912 |
(void) v9fs_string_sprintf;
|
| 913 |
(void) v9fs_string_copy;
|
| 914 |
(void) v9fs_string_size;
|
| 915 |
(void) v9fs_do_lstat;
|
| 916 |
(void) v9fs_do_setuid;
|
| 917 |
(void) v9fs_do_readlink;
|
| 918 |
(void) v9fs_do_close;
|
| 919 |
(void) v9fs_do_closedir;
|
| 920 |
(void) alloc_fid;
|
| 921 |
(void) free_fid;
|
| 922 |
(void) fid_to_qid;
|
| 923 |
(void) v9mode_to_mode;
|
| 924 |
(void) donttouch_stat;
|
| 925 |
(void) v9fs_stat_free;
|
| 926 |
(void) stat_to_v9stat;
|
| 927 |
(void) adjust_sg;
|
| 928 |
(void) cap_sg;
|
| 929 |
(void) print_sg;
|
| 930 |
} |
| 931 |
|
| 932 |
static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
| 933 |
{
|
| 934 |
int32_t msize; |
| 935 |
V9fsString version; |
| 936 |
size_t offset = 7;
|
| 937 |
|
| 938 |
pdu_unmarshal(pdu, offset, "ds", &msize, &version);
|
| 939 |
|
| 940 |
if (strcmp(version.data, "9P2000.u")) { |
| 941 |
v9fs_string_sprintf(&version, "unknown");
|
| 942 |
} |
| 943 |
|
| 944 |
offset += pdu_marshal(pdu, offset, "ds", msize, &version);
|
| 945 |
complete_pdu(s, pdu, offset); |
| 946 |
|
| 947 |
v9fs_string_free(&version); |
| 948 |
} |
| 949 |
|
| 950 |
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) |
| 951 |
{
|
| 952 |
int32_t fid, afid, n_uname; |
| 953 |
V9fsString uname, aname; |
| 954 |
V9fsFidState *fidp; |
| 955 |
V9fsQID qid; |
| 956 |
size_t offset = 7;
|
| 957 |
ssize_t err; |
| 958 |
|
| 959 |
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
| 960 |
|
| 961 |
fidp = alloc_fid(s, fid); |
| 962 |
if (fidp == NULL) { |
| 963 |
err = -EINVAL; |
| 964 |
goto out;
|
| 965 |
} |
| 966 |
|
| 967 |
fidp->uid = n_uname; |
| 968 |
|
| 969 |
v9fs_string_sprintf(&fidp->path, "%s", "/"); |
| 970 |
err = fid_to_qid(s, fidp, &qid); |
| 971 |
if (err) {
|
| 972 |
err = -EINVAL; |
| 973 |
free_fid(s, fid); |
| 974 |
goto out;
|
| 975 |
} |
| 976 |
|
| 977 |
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
| 978 |
|
| 979 |
err = offset; |
| 980 |
out:
|
| 981 |
complete_pdu(s, pdu, err); |
| 982 |
v9fs_string_free(&uname); |
| 983 |
v9fs_string_free(&aname); |
| 984 |
} |
| 985 |
|
| 986 |
typedef struct V9fsStatState { |
| 987 |
V9fsPDU *pdu; |
| 988 |
size_t offset; |
| 989 |
V9fsStat v9stat; |
| 990 |
V9fsFidState *fidp; |
| 991 |
struct stat stbuf;
|
| 992 |
} V9fsStatState; |
| 993 |
|
| 994 |
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
| 995 |
{
|
| 996 |
if (err == -1) { |
| 997 |
err = -errno; |
| 998 |
goto out;
|
| 999 |
} |
| 1000 |
|
| 1001 |
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); |
| 1002 |
if (err) {
|
| 1003 |
goto out;
|
| 1004 |
} |
| 1005 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); |
| 1006 |
err = vs->offset; |
| 1007 |
|
| 1008 |
out:
|
| 1009 |
complete_pdu(s, vs->pdu, err); |
| 1010 |
v9fs_stat_free(&vs->v9stat); |
| 1011 |
qemu_free(vs); |
| 1012 |
} |
| 1013 |
|
| 1014 |
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
| 1015 |
{
|
| 1016 |
int32_t fid; |
| 1017 |
V9fsStatState *vs; |
| 1018 |
ssize_t err = 0;
|
| 1019 |
|
| 1020 |
vs = qemu_malloc(sizeof(*vs));
|
| 1021 |
vs->pdu = pdu; |
| 1022 |
vs->offset = 7;
|
| 1023 |
|
| 1024 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
| 1025 |
|
| 1026 |
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
| 1027 |
|
| 1028 |
vs->fidp = lookup_fid(s, fid); |
| 1029 |
if (vs->fidp == NULL) { |
| 1030 |
err = -ENOENT; |
| 1031 |
goto out;
|
| 1032 |
} |
| 1033 |
|
| 1034 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
| 1035 |
v9fs_stat_post_lstat(s, vs, err); |
| 1036 |
return;
|
| 1037 |
|
| 1038 |
out:
|
| 1039 |
complete_pdu(s, vs->pdu, err); |
| 1040 |
v9fs_stat_free(&vs->v9stat); |
| 1041 |
qemu_free(vs); |
| 1042 |
} |
| 1043 |
|
| 1044 |
typedef struct V9fsWalkState { |
| 1045 |
V9fsPDU *pdu; |
| 1046 |
size_t offset; |
| 1047 |
int16_t nwnames; |
| 1048 |
int name_idx;
|
| 1049 |
V9fsQID *qids; |
| 1050 |
V9fsFidState *fidp; |
| 1051 |
V9fsFidState *newfidp; |
| 1052 |
V9fsString path; |
| 1053 |
V9fsString *wnames; |
| 1054 |
struct stat stbuf;
|
| 1055 |
} V9fsWalkState; |
| 1056 |
|
| 1057 |
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
| 1058 |
{
|
| 1059 |
complete_pdu(s, vs->pdu, err); |
| 1060 |
|
| 1061 |
if (vs->nwnames) {
|
| 1062 |
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
| 1063 |
v9fs_string_free(&vs->wnames[vs->name_idx]); |
| 1064 |
} |
| 1065 |
|
| 1066 |
qemu_free(vs->wnames); |
| 1067 |
qemu_free(vs->qids); |
| 1068 |
} |
| 1069 |
} |
| 1070 |
|
| 1071 |
static void v9fs_walk_marshal(V9fsWalkState *vs) |
| 1072 |
{
|
| 1073 |
int i;
|
| 1074 |
vs->offset = 7;
|
| 1075 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
| 1076 |
|
| 1077 |
for (i = 0; i < vs->nwnames; i++) { |
| 1078 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
| 1079 |
} |
| 1080 |
} |
| 1081 |
|
| 1082 |
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, |
| 1083 |
int err)
|
| 1084 |
{
|
| 1085 |
if (err == -1) { |
| 1086 |
free_fid(s, vs->newfidp->fid); |
| 1087 |
v9fs_string_free(&vs->path); |
| 1088 |
err = -ENOENT; |
| 1089 |
goto out;
|
| 1090 |
} |
| 1091 |
|
| 1092 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
| 1093 |
|
| 1094 |
vs->name_idx++; |
| 1095 |
if (vs->name_idx < vs->nwnames) {
|
| 1096 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
| 1097 |
vs->wnames[vs->name_idx].data); |
| 1098 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
| 1099 |
|
| 1100 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
| 1101 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
| 1102 |
return;
|
| 1103 |
} |
| 1104 |
|
| 1105 |
v9fs_string_free(&vs->path); |
| 1106 |
v9fs_walk_marshal(vs); |
| 1107 |
err = vs->offset; |
| 1108 |
out:
|
| 1109 |
v9fs_walk_complete(s, vs, err); |
| 1110 |
} |
| 1111 |
|
| 1112 |
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, |
| 1113 |
int err)
|
| 1114 |
{
|
| 1115 |
if (err == -1) { |
| 1116 |
v9fs_string_free(&vs->path); |
| 1117 |
err = -ENOENT; |
| 1118 |
goto out;
|
| 1119 |
} |
| 1120 |
|
| 1121 |
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); |
| 1122 |
vs->name_idx++; |
| 1123 |
if (vs->name_idx < vs->nwnames) {
|
| 1124 |
|
| 1125 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
| 1126 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
| 1127 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
| 1128 |
|
| 1129 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
| 1130 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
| 1131 |
return;
|
| 1132 |
} |
| 1133 |
|
| 1134 |
v9fs_string_free(&vs->path); |
| 1135 |
v9fs_walk_marshal(vs); |
| 1136 |
err = vs->offset; |
| 1137 |
out:
|
| 1138 |
v9fs_walk_complete(s, vs, err); |
| 1139 |
} |
| 1140 |
|
| 1141 |
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
| 1142 |
{
|
| 1143 |
int32_t fid, newfid; |
| 1144 |
V9fsWalkState *vs; |
| 1145 |
int err = 0; |
| 1146 |
int i;
|
| 1147 |
|
| 1148 |
vs = qemu_malloc(sizeof(*vs));
|
| 1149 |
vs->pdu = pdu; |
| 1150 |
vs->wnames = NULL;
|
| 1151 |
vs->qids = NULL;
|
| 1152 |
vs->offset = 7;
|
| 1153 |
|
| 1154 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
| 1155 |
&newfid, &vs->nwnames); |
| 1156 |
|
| 1157 |
if (vs->nwnames) {
|
| 1158 |
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
| 1159 |
|
| 1160 |
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); |
| 1161 |
|
| 1162 |
for (i = 0; i < vs->nwnames; i++) { |
| 1163 |
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
| 1164 |
&vs->wnames[i]); |
| 1165 |
} |
| 1166 |
} |
| 1167 |
|
| 1168 |
vs->fidp = lookup_fid(s, fid); |
| 1169 |
if (vs->fidp == NULL) { |
| 1170 |
err = -ENOENT; |
| 1171 |
goto out;
|
| 1172 |
} |
| 1173 |
|
| 1174 |
/* FIXME: is this really valid? */
|
| 1175 |
if (fid == newfid) {
|
| 1176 |
|
| 1177 |
BUG_ON(vs->fidp->fd != -1);
|
| 1178 |
BUG_ON(vs->fidp->dir); |
| 1179 |
v9fs_string_init(&vs->path); |
| 1180 |
vs->name_idx = 0;
|
| 1181 |
|
| 1182 |
if (vs->name_idx < vs->nwnames) {
|
| 1183 |
v9fs_string_sprintf(&vs->path, "%s/%s",
|
| 1184 |
vs->fidp->path.data, vs->wnames[vs->name_idx].data); |
| 1185 |
v9fs_string_copy(&vs->fidp->path, &vs->path); |
| 1186 |
|
| 1187 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
| 1188 |
v9fs_walk_post_oldfid_lstat(s, vs, err); |
| 1189 |
return;
|
| 1190 |
} |
| 1191 |
} else {
|
| 1192 |
vs->newfidp = alloc_fid(s, newfid); |
| 1193 |
if (vs->newfidp == NULL) { |
| 1194 |
err = -EINVAL; |
| 1195 |
goto out;
|
| 1196 |
} |
| 1197 |
|
| 1198 |
vs->newfidp->uid = vs->fidp->uid; |
| 1199 |
v9fs_string_init(&vs->path); |
| 1200 |
vs->name_idx = 0;
|
| 1201 |
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); |
| 1202 |
|
| 1203 |
if (vs->name_idx < vs->nwnames) {
|
| 1204 |
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
| 1205 |
vs->wnames[vs->name_idx].data); |
| 1206 |
v9fs_string_copy(&vs->newfidp->path, &vs->path); |
| 1207 |
|
| 1208 |
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); |
| 1209 |
v9fs_walk_post_newfid_lstat(s, vs, err); |
| 1210 |
return;
|
| 1211 |
} |
| 1212 |
} |
| 1213 |
|
| 1214 |
v9fs_walk_marshal(vs); |
| 1215 |
err = vs->offset; |
| 1216 |
out:
|
| 1217 |
v9fs_walk_complete(s, vs, err); |
| 1218 |
} |
| 1219 |
|
| 1220 |
typedef struct V9fsOpenState { |
| 1221 |
V9fsPDU *pdu; |
| 1222 |
size_t offset; |
| 1223 |
int8_t mode; |
| 1224 |
V9fsFidState *fidp; |
| 1225 |
V9fsQID qid; |
| 1226 |
struct stat stbuf;
|
| 1227 |
|
| 1228 |
} V9fsOpenState; |
| 1229 |
|
| 1230 |
enum {
|
| 1231 |
Oread = 0x00,
|
| 1232 |
Owrite = 0x01,
|
| 1233 |
Ordwr = 0x02,
|
| 1234 |
Oexec = 0x03,
|
| 1235 |
Oexcl = 0x04,
|
| 1236 |
Otrunc = 0x10,
|
| 1237 |
Orexec = 0x20,
|
| 1238 |
Orclose = 0x40,
|
| 1239 |
Oappend = 0x80,
|
| 1240 |
}; |
| 1241 |
|
| 1242 |
static int omode_to_uflags(int8_t mode) |
| 1243 |
{
|
| 1244 |
int ret = 0; |
| 1245 |
|
| 1246 |
switch (mode & 3) { |
| 1247 |
case Oread:
|
| 1248 |
ret = O_RDONLY; |
| 1249 |
break;
|
| 1250 |
case Ordwr:
|
| 1251 |
ret = O_RDWR; |
| 1252 |
break;
|
| 1253 |
case Owrite:
|
| 1254 |
ret = O_WRONLY; |
| 1255 |
break;
|
| 1256 |
case Oexec:
|
| 1257 |
ret = O_RDONLY; |
| 1258 |
break;
|
| 1259 |
} |
| 1260 |
|
| 1261 |
if (mode & Otrunc) {
|
| 1262 |
ret |= O_TRUNC; |
| 1263 |
} |
| 1264 |
|
| 1265 |
if (mode & Oappend) {
|
| 1266 |
ret |= O_APPEND; |
| 1267 |
} |
| 1268 |
|
| 1269 |
if (mode & Oexcl) {
|
| 1270 |
ret |= O_EXCL; |
| 1271 |
} |
| 1272 |
|
| 1273 |
return ret;
|
| 1274 |
} |
| 1275 |
|
| 1276 |
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
| 1277 |
{
|
| 1278 |
if (vs->fidp->dir == NULL) { |
| 1279 |
err = -errno; |
| 1280 |
goto out;
|
| 1281 |
} |
| 1282 |
|
| 1283 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
| 1284 |
err = vs->offset; |
| 1285 |
out:
|
| 1286 |
complete_pdu(s, vs->pdu, err); |
| 1287 |
qemu_free(vs); |
| 1288 |
|
| 1289 |
} |
| 1290 |
|
| 1291 |
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
| 1292 |
{
|
| 1293 |
if (vs->fidp->fd == -1) { |
| 1294 |
err = -errno; |
| 1295 |
goto out;
|
| 1296 |
} |
| 1297 |
|
| 1298 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
| 1299 |
err = vs->offset; |
| 1300 |
out:
|
| 1301 |
complete_pdu(s, vs->pdu, err); |
| 1302 |
qemu_free(vs); |
| 1303 |
} |
| 1304 |
|
| 1305 |
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) |
| 1306 |
{
|
| 1307 |
if (err) {
|
| 1308 |
err = -errno; |
| 1309 |
goto out;
|
| 1310 |
} |
| 1311 |
|
| 1312 |
stat_to_qid(&vs->stbuf, &vs->qid); |
| 1313 |
|
| 1314 |
if (S_ISDIR(vs->stbuf.st_mode)) {
|
| 1315 |
vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path); |
| 1316 |
v9fs_open_post_opendir(s, vs, err); |
| 1317 |
} else {
|
| 1318 |
vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path, |
| 1319 |
omode_to_uflags(vs->mode)); |
| 1320 |
v9fs_open_post_open(s, vs, err); |
| 1321 |
} |
| 1322 |
return;
|
| 1323 |
out:
|
| 1324 |
complete_pdu(s, vs->pdu, err); |
| 1325 |
qemu_free(vs); |
| 1326 |
} |
| 1327 |
|
| 1328 |
static void v9fs_open(V9fsState *s, V9fsPDU *pdu) |
| 1329 |
{
|
| 1330 |
int32_t fid; |
| 1331 |
V9fsOpenState *vs; |
| 1332 |
ssize_t err = 0;
|
| 1333 |
|
| 1334 |
|
| 1335 |
vs = qemu_malloc(sizeof(*vs));
|
| 1336 |
vs->pdu = pdu; |
| 1337 |
vs->offset = 7;
|
| 1338 |
|
| 1339 |
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
| 1340 |
|
| 1341 |
vs->fidp = lookup_fid(s, fid); |
| 1342 |
if (vs->fidp == NULL) { |
| 1343 |
err = -ENOENT; |
| 1344 |
goto out;
|
| 1345 |
} |
| 1346 |
|
| 1347 |
BUG_ON(vs->fidp->fd != -1);
|
| 1348 |
BUG_ON(vs->fidp->dir); |
| 1349 |
|
| 1350 |
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); |
| 1351 |
|
| 1352 |
v9fs_open_post_lstat(s, vs, err); |
| 1353 |
return;
|
| 1354 |
out:
|
| 1355 |
complete_pdu(s, pdu, err); |
| 1356 |
qemu_free(vs); |
| 1357 |
} |
| 1358 |
|
| 1359 |
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
| 1360 |
{
|
| 1361 |
int32_t fid; |
| 1362 |
size_t offset = 7;
|
| 1363 |
int err;
|
| 1364 |
|
| 1365 |
pdu_unmarshal(pdu, offset, "d", &fid);
|
| 1366 |
|
| 1367 |
err = free_fid(s, fid); |
| 1368 |
if (err < 0) { |
| 1369 |
goto out;
|
| 1370 |
} |
| 1371 |
|
| 1372 |
offset = 7;
|
| 1373 |
err = offset; |
| 1374 |
out:
|
| 1375 |
complete_pdu(s, pdu, err); |
| 1376 |
} |
| 1377 |
|
| 1378 |
typedef struct V9fsReadState { |
| 1379 |
V9fsPDU *pdu; |
| 1380 |
size_t offset; |
| 1381 |
int32_t count; |
| 1382 |
int32_t total; |
| 1383 |
int64_t off; |
| 1384 |
V9fsFidState *fidp; |
| 1385 |
struct iovec iov[128]; /* FIXME: bad, bad, bad */ |
| 1386 |
struct iovec *sg;
|
| 1387 |
off_t dir_pos; |
| 1388 |
struct dirent *dent;
|
| 1389 |
struct stat stbuf;
|
| 1390 |
V9fsString name; |
| 1391 |
V9fsStat v9stat; |
| 1392 |
int32_t len; |
| 1393 |
int32_t cnt; |
| 1394 |
int32_t max_count; |
| 1395 |
} V9fsReadState; |
| 1396 |
|
| 1397 |
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
| 1398 |
|
| 1399 |
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
| 1400 |
{
|
| 1401 |
if (err) {
|
| 1402 |
goto out;
|
| 1403 |
} |
| 1404 |
v9fs_stat_free(&vs->v9stat); |
| 1405 |
v9fs_string_free(&vs->name); |
| 1406 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
| 1407 |
vs->offset += vs->count; |
| 1408 |
err = vs->offset; |
| 1409 |
out:
|
| 1410 |
complete_pdu(s, vs->pdu, err); |
| 1411 |
qemu_free(vs); |
| 1412 |
return;
|
| 1413 |
} |
| 1414 |
|
| 1415 |
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, |
| 1416 |
ssize_t err) |
| 1417 |
{
|
| 1418 |
if (err) {
|
| 1419 |
err = -errno; |
| 1420 |
goto out;
|
| 1421 |
} |
| 1422 |
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); |
| 1423 |
if (err) {
|
| 1424 |
goto out;
|
| 1425 |
} |
| 1426 |
|
| 1427 |
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", |
| 1428 |
&vs->v9stat); |
| 1429 |
if ((vs->len != (vs->v9stat.size + 2)) || |
| 1430 |
((vs->count + vs->len) > vs->max_count)) {
|
| 1431 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); |
| 1432 |
v9fs_read_post_seekdir(s, vs, err); |
| 1433 |
return;
|
| 1434 |
} |
| 1435 |
vs->count += vs->len; |
| 1436 |
v9fs_stat_free(&vs->v9stat); |
| 1437 |
v9fs_string_free(&vs->name); |
| 1438 |
vs->dir_pos = vs->dent->d_off; |
| 1439 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
| 1440 |
v9fs_read_post_readdir(s, vs, err); |
| 1441 |
return;
|
| 1442 |
out:
|
| 1443 |
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); |
| 1444 |
v9fs_read_post_seekdir(s, vs, err); |
| 1445 |
return;
|
| 1446 |
|
| 1447 |
} |
| 1448 |
|
| 1449 |
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
| 1450 |
{
|
| 1451 |
if (vs->dent) {
|
| 1452 |
memset(&vs->v9stat, 0, sizeof(vs->v9stat)); |
| 1453 |
v9fs_string_init(&vs->name); |
| 1454 |
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
| 1455 |
vs->dent->d_name); |
| 1456 |
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); |
| 1457 |
v9fs_read_post_dir_lstat(s, vs, err); |
| 1458 |
return;
|
| 1459 |
} |
| 1460 |
|
| 1461 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
| 1462 |
vs->offset += vs->count; |
| 1463 |
err = vs->offset; |
| 1464 |
complete_pdu(s, vs->pdu, err); |
| 1465 |
qemu_free(vs); |
| 1466 |
return;
|
| 1467 |
} |
| 1468 |
|
| 1469 |
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) |
| 1470 |
{
|
| 1471 |
vs->dent = v9fs_do_readdir(s, vs->fidp->dir); |
| 1472 |
v9fs_read_post_readdir(s, vs, err); |
| 1473 |
return;
|
| 1474 |
} |
| 1475 |
|
| 1476 |
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, |
| 1477 |
ssize_t err) |
| 1478 |
{
|
| 1479 |
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir); |
| 1480 |
v9fs_read_post_telldir(s, vs, err); |
| 1481 |
return;
|
| 1482 |
} |
| 1483 |
|
| 1484 |
static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
| 1485 |
{
|
| 1486 |
if (err < 0) { |
| 1487 |
/* IO error return the error */
|
| 1488 |
err = -errno; |
| 1489 |
goto out;
|
| 1490 |
} |
| 1491 |
vs->total += vs->len; |
| 1492 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
| 1493 |
if (vs->total < vs->count && vs->len > 0) { |
| 1494 |
do {
|
| 1495 |
if (0) { |
| 1496 |
print_sg(vs->sg, vs->cnt); |
| 1497 |
} |
| 1498 |
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); |
| 1499 |
} while (vs->len == -1 && errno == EINTR); |
| 1500 |
if (vs->len == -1) { |
| 1501 |
err = -errno; |
| 1502 |
} |
| 1503 |
v9fs_read_post_readv(s, vs, err); |
| 1504 |
return;
|
| 1505 |
} |
| 1506 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
| 1507 |
vs->offset += vs->count; |
| 1508 |
err = vs->offset; |
| 1509 |
|
| 1510 |
out:
|
| 1511 |
complete_pdu(s, vs->pdu, err); |
| 1512 |
qemu_free(vs); |
| 1513 |
} |
| 1514 |
|
| 1515 |
static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) |
| 1516 |
{
|
| 1517 |
if (err == -1) { |
| 1518 |
err = -errno; |
| 1519 |
goto out;
|
| 1520 |
} |
| 1521 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
| 1522 |
|
| 1523 |
if (vs->total < vs->count) {
|
| 1524 |
do {
|
| 1525 |
if (0) { |
| 1526 |
print_sg(vs->sg, vs->cnt); |
| 1527 |
} |
| 1528 |
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); |
| 1529 |
} while (vs->len == -1 && errno == EINTR); |
| 1530 |
if (vs->len == -1) { |
| 1531 |
err = -errno; |
| 1532 |
} |
| 1533 |
v9fs_read_post_readv(s, vs, err); |
| 1534 |
return;
|
| 1535 |
} |
| 1536 |
out:
|
| 1537 |
complete_pdu(s, vs->pdu, err); |
| 1538 |
qemu_free(vs); |
| 1539 |
} |
| 1540 |
|
| 1541 |
static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
| 1542 |
{
|
| 1543 |
int32_t fid; |
| 1544 |
V9fsReadState *vs; |
| 1545 |
ssize_t err = 0;
|
| 1546 |
|
| 1547 |
vs = qemu_malloc(sizeof(*vs));
|
| 1548 |
vs->pdu = pdu; |
| 1549 |
vs->offset = 7;
|
| 1550 |
vs->total = 0;
|
| 1551 |
vs->len = 0;
|
| 1552 |
vs->count = 0;
|
| 1553 |
|
| 1554 |
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
| 1555 |
|
| 1556 |
vs->fidp = lookup_fid(s, fid); |
| 1557 |
if (vs->fidp == NULL) { |
| 1558 |
err = -EINVAL; |
| 1559 |
goto out;
|
| 1560 |
} |
| 1561 |
|
| 1562 |
if (vs->fidp->dir) {
|
| 1563 |
vs->max_count = vs->count; |
| 1564 |
vs->count = 0;
|
| 1565 |
if (vs->off == 0) { |
| 1566 |
v9fs_do_rewinddir(s, vs->fidp->dir); |
| 1567 |
} |
| 1568 |
v9fs_read_post_rewinddir(s, vs, err); |
| 1569 |
return;
|
| 1570 |
} else if (vs->fidp->fd != -1) { |
| 1571 |
vs->sg = vs->iov; |
| 1572 |
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); |
| 1573 |
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); |
| 1574 |
v9fs_read_post_lseek(s, vs, err); |
| 1575 |
return;
|
| 1576 |
} else {
|
| 1577 |
err = -EINVAL; |
| 1578 |
} |
| 1579 |
out:
|
| 1580 |
complete_pdu(s, pdu, err); |
| 1581 |
qemu_free(vs); |
| 1582 |
} |
| 1583 |
|
| 1584 |
typedef struct V9fsWriteState { |
| 1585 |
V9fsPDU *pdu; |
| 1586 |
size_t offset; |
| 1587 |
int32_t len; |
| 1588 |
int32_t count; |
| 1589 |
int32_t total; |
| 1590 |
int64_t off; |
| 1591 |
V9fsFidState *fidp; |
| 1592 |
struct iovec iov[128]; /* FIXME: bad, bad, bad */ |
| 1593 |
struct iovec *sg;
|
| 1594 |
int cnt;
|
| 1595 |
} V9fsWriteState; |
| 1596 |
|
| 1597 |
static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, |
| 1598 |
ssize_t err) |
| 1599 |
{
|
| 1600 |
if (err < 0) { |
| 1601 |
/* IO error return the error */
|
| 1602 |
err = -errno; |
| 1603 |
goto out;
|
| 1604 |
} |
| 1605 |
vs->total += vs->len; |
| 1606 |
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); |
| 1607 |
if (vs->total < vs->count && vs->len > 0) { |
| 1608 |
do {
|
| 1609 |
if (0) { |
| 1610 |
print_sg(vs->sg, vs->cnt); |
| 1611 |
} |
| 1612 |
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); |
| 1613 |
} while (vs->len == -1 && errno == EINTR); |
| 1614 |
if (vs->len == -1) { |
| 1615 |
err = -errno; |
| 1616 |
} |
| 1617 |
v9fs_write_post_writev(s, vs, err); |
| 1618 |
return;
|
| 1619 |
} |
| 1620 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
| 1621 |
|
| 1622 |
err = vs->offset; |
| 1623 |
out:
|
| 1624 |
complete_pdu(s, vs->pdu, err); |
| 1625 |
qemu_free(vs); |
| 1626 |
} |
| 1627 |
|
| 1628 |
static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) |
| 1629 |
{
|
| 1630 |
if (err == -1) { |
| 1631 |
err = -errno; |
| 1632 |
goto out;
|
| 1633 |
} |
| 1634 |
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
| 1635 |
|
| 1636 |
if (vs->total < vs->count) {
|
| 1637 |
do {
|
| 1638 |
if (0) { |
| 1639 |
print_sg(vs->sg, vs->cnt); |
| 1640 |
} |
| 1641 |
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); |
| 1642 |
} while (vs->len == -1 && errno == EINTR); |
| 1643 |
if (vs->len == -1) { |
| 1644 |
err = -errno; |
| 1645 |
} |
| 1646 |
v9fs_write_post_writev(s, vs, err); |
| 1647 |
return;
|
| 1648 |
} |
| 1649 |
|
| 1650 |
out:
|
| 1651 |
complete_pdu(s, vs->pdu, err); |
| 1652 |
qemu_free(vs); |
| 1653 |
} |
| 1654 |
|
| 1655 |
static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
| 1656 |
{
|
| 1657 |
int32_t fid; |
| 1658 |
V9fsWriteState *vs; |
| 1659 |
ssize_t err; |
| 1660 |
|
| 1661 |
vs = qemu_malloc(sizeof(*vs));
|
| 1662 |
|
| 1663 |
vs->pdu = pdu; |
| 1664 |
vs->offset = 7;
|
| 1665 |
vs->sg = vs->iov; |
| 1666 |
vs->total = 0;
|
| 1667 |
vs->len = 0;
|
| 1668 |
|
| 1669 |
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
| 1670 |
vs->sg, &vs->cnt); |
| 1671 |
|
| 1672 |
vs->fidp = lookup_fid(s, fid); |
| 1673 |
if (vs->fidp == NULL) { |
| 1674 |
err = -EINVAL; |
| 1675 |
goto out;
|
| 1676 |
} |
| 1677 |
|
| 1678 |
if (vs->fidp->fd == -1) { |
| 1679 |
err = -EINVAL; |
| 1680 |
goto out;
|
| 1681 |
} |
| 1682 |
|
| 1683 |
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); |
| 1684 |
|
| 1685 |
v9fs_write_post_lseek(s, vs, err); |
| 1686 |
return;
|
| 1687 |
|
| 1688 |
out:
|
| 1689 |
complete_pdu(s, vs->pdu, err); |
| 1690 |
qemu_free(vs); |
| 1691 |
} |
| 1692 |
|
| 1693 |
typedef struct V9fsCreateState { |
| 1694 |
V9fsPDU *pdu; |
| 1695 |
size_t offset; |
| 1696 |
V9fsFidState *fidp; |
| 1697 |
V9fsQID qid; |
| 1698 |
int32_t perm; |
| 1699 |
int8_t mode; |
| 1700 |
struct stat stbuf;
|
| 1701 |
V9fsString name; |
| 1702 |
V9fsString extension; |
| 1703 |
V9fsString fullname; |
| 1704 |
} V9fsCreateState; |
| 1705 |
|
| 1706 |
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
| 1707 |
{
|
| 1708 |
if (err == 0) { |
| 1709 |
v9fs_string_copy(&vs->fidp->path, &vs->fullname); |
| 1710 |
stat_to_qid(&vs->stbuf, &vs->qid); |
| 1711 |
|
| 1712 |
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
| 1713 |
|
| 1714 |
err = vs->offset; |
| 1715 |
} |
| 1716 |
|
| 1717 |
complete_pdu(s, vs->pdu, err); |
| 1718 |
v9fs_string_free(&vs->name); |
| 1719 |
v9fs_string_free(&vs->extension); |
| 1720 |
v9fs_string_free(&vs->fullname); |
| 1721 |
qemu_free(vs); |
| 1722 |
} |
| 1723 |
|
| 1724 |
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) |
| 1725 |
{
|
| 1726 |
if (err) {
|
| 1727 |
err = -errno; |
| 1728 |
} |
| 1729 |
v9fs_post_create(s, vs, err); |
| 1730 |
} |
| 1731 |
|
| 1732 |
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, |
| 1733 |
int err)
|
| 1734 |
{
|
| 1735 |
if (!vs->fidp->dir) {
|
| 1736 |
err = -errno; |
| 1737 |
} |
| 1738 |
v9fs_post_create(s, vs, err); |
| 1739 |
} |
| 1740 |
|
| 1741 |
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, |
| 1742 |
int err)
|
| 1743 |
{
|
| 1744 |
if (err) {
|
| 1745 |
err = -errno; |
| 1746 |
goto out;
|
| 1747 |
} |
| 1748 |
|
| 1749 |
vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname); |
| 1750 |
v9fs_create_post_opendir(s, vs, err); |
| 1751 |
return;
|
| 1752 |
|
| 1753 |
out:
|
| 1754 |
v9fs_post_create(s, vs, err); |
| 1755 |
} |
| 1756 |
|
| 1757 |
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) |
| 1758 |
{
|
| 1759 |
if (err) {
|
| 1760 |
err = -errno; |
| 1761 |
goto out;
|
| 1762 |
} |
| 1763 |
|
| 1764 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
| 1765 |
v9fs_create_post_dir_lstat(s, vs, err); |
| 1766 |
return;
|
| 1767 |
|
| 1768 |
out:
|
| 1769 |
v9fs_post_create(s, vs, err); |
| 1770 |
} |
| 1771 |
|
| 1772 |
static void v9fs_create_post_mksock(V9fsState *s, V9fsCreateState *vs, |
| 1773 |
int err)
|
| 1774 |
{
|
| 1775 |
if (err) {
|
| 1776 |
err = -errno; |
| 1777 |
goto out;
|
| 1778 |
} |
| 1779 |
|
| 1780 |
err = v9fs_do_chmod(s, &vs->fullname, vs->perm & 0777);
|
| 1781 |
v9fs_create_post_perms(s, vs, err); |
| 1782 |
return;
|
| 1783 |
|
| 1784 |
out:
|
| 1785 |
v9fs_post_create(s, vs, err); |
| 1786 |
} |
| 1787 |
|
| 1788 |
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
| 1789 |
{
|
| 1790 |
if (err) {
|
| 1791 |
vs->fidp->fd = -1;
|
| 1792 |
err = -errno; |
| 1793 |
} |
| 1794 |
|
| 1795 |
v9fs_post_create(s, vs, err); |
| 1796 |
return;
|
| 1797 |
} |
| 1798 |
|
| 1799 |
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) |
| 1800 |
{
|
| 1801 |
if (vs->fidp->fd == -1) { |
| 1802 |
err = -errno; |
| 1803 |
goto out;
|
| 1804 |
} |
| 1805 |
|
| 1806 |
err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf); |
| 1807 |
v9fs_create_post_fstat(s, vs, err); |
| 1808 |
|
| 1809 |
return;
|
| 1810 |
|
| 1811 |
out:
|
| 1812 |
v9fs_post_create(s, vs, err); |
| 1813 |
|
| 1814 |
} |
| 1815 |
|
| 1816 |
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) |
| 1817 |
{
|
| 1818 |
|
| 1819 |
if (err == 0 || errno != ENOENT) { |
| 1820 |
err = -errno; |
| 1821 |
goto out;
|
| 1822 |
} |
| 1823 |
|
| 1824 |
if (vs->perm & P9_STAT_MODE_DIR) {
|
| 1825 |
err = v9fs_do_mkdir(s, &vs->fullname, vs->perm & 0777);
|
| 1826 |
v9fs_create_post_mkdir(s, vs, err); |
| 1827 |
} else if (vs->perm & P9_STAT_MODE_SYMLINK) { |
| 1828 |
err = v9fs_do_symlink(s, &vs->extension, &vs->fullname); |
| 1829 |
v9fs_create_post_perms(s, vs, err); |
| 1830 |
} else if (vs->perm & P9_STAT_MODE_LINK) { |
| 1831 |
int32_t nfid = atoi(vs->extension.data); |
| 1832 |
V9fsFidState *nfidp = lookup_fid(s, nfid); |
| 1833 |
if (nfidp == NULL) { |
| 1834 |
err = -errno; |
| 1835 |
v9fs_post_create(s, vs, err); |
| 1836 |
} |
| 1837 |
err = v9fs_do_link(s, &nfidp->path, &vs->fullname); |
| 1838 |
v9fs_create_post_perms(s, vs, err); |
| 1839 |
} else if (vs->perm & P9_STAT_MODE_DEVICE) { |
| 1840 |
char ctype;
|
| 1841 |
uint32_t major, minor; |
| 1842 |
mode_t nmode = 0;
|
| 1843 |
|
| 1844 |
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, |
| 1845 |
&minor) != 3) {
|
| 1846 |
err = -errno; |
| 1847 |
v9fs_post_create(s, vs, err); |
| 1848 |
} |
| 1849 |
|
| 1850 |
switch (ctype) {
|
| 1851 |
case 'c': |
| 1852 |
nmode = S_IFCHR; |
| 1853 |
break;
|
| 1854 |
case 'b': |
| 1855 |
nmode = S_IFBLK; |
| 1856 |
break;
|
| 1857 |
default:
|
| 1858 |
err = -EIO; |
| 1859 |
v9fs_post_create(s, vs, err); |
| 1860 |
} |
| 1861 |
|
| 1862 |
nmode |= vs->perm & 0777;
|
| 1863 |
err = v9fs_do_mknod(s, &vs->fullname, nmode, makedev(major, minor)); |
| 1864 |
v9fs_create_post_perms(s, vs, err); |
| 1865 |
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { |
| 1866 |
err = v9fs_do_mknod(s, &vs->fullname, S_IFIFO | (vs->mode & 0777), 0); |
| 1867 |
v9fs_post_create(s, vs, err); |
| 1868 |
} else if (vs->perm & P9_STAT_MODE_SOCKET) { |
| 1869 |
err = v9fs_do_mksock(s, &vs->fullname); |
| 1870 |
v9fs_create_post_mksock(s, vs, err); |
| 1871 |
} else {
|
| 1872 |
vs->fidp->fd = v9fs_do_open2(s, &vs->fullname, |
| 1873 |
omode_to_uflags(vs->mode) | O_CREAT, |
| 1874 |
vs->perm & 0777);
|
| 1875 |
v9fs_create_post_open2(s, vs, err); |
| 1876 |
} |
| 1877 |
|
| 1878 |
return;
|
| 1879 |
|
| 1880 |
out:
|
| 1881 |
v9fs_post_create(s, vs, err); |
| 1882 |
} |
| 1883 |
|
| 1884 |
static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
| 1885 |
{
|
| 1886 |
int32_t fid; |
| 1887 |
V9fsCreateState *vs; |
| 1888 |
int err = 0; |
| 1889 |
|
| 1890 |
vs = qemu_malloc(sizeof(*vs));
|
| 1891 |
vs->pdu = pdu; |
| 1892 |
vs->offset = 7;
|
| 1893 |
|
| 1894 |
v9fs_string_init(&vs->fullname); |
| 1895 |
|
| 1896 |
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
| 1897 |
&vs->perm, &vs->mode, &vs->extension); |
| 1898 |
|
| 1899 |
vs->fidp = lookup_fid(s, fid); |
| 1900 |
if (vs->fidp == NULL) { |
| 1901 |
err = -EINVAL; |
| 1902 |
goto out;
|
| 1903 |
} |
| 1904 |
|
| 1905 |
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
| 1906 |
vs->name.data); |
| 1907 |
|
| 1908 |
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); |
| 1909 |
v9fs_create_post_lstat(s, vs, err); |
| 1910 |
return;
|
| 1911 |
|
| 1912 |
out:
|
| 1913 |
complete_pdu(s, vs->pdu, err); |
| 1914 |
v9fs_string_free(&vs->name); |
| 1915 |
v9fs_string_free(&vs->extension); |
| 1916 |
qemu_free(vs); |
| 1917 |
} |
| 1918 |
|
| 1919 |
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
| 1920 |
{
|
| 1921 |
v9fs_dummy(s, pdu); |
| 1922 |
if (debug_9p_pdu) {
|
| 1923 |
pprint_pdu(pdu); |
| 1924 |
} |
| 1925 |
} |
| 1926 |
|
| 1927 |
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
| 1928 |
{
|
| 1929 |
if (debug_9p_pdu) {
|
| 1930 |
pprint_pdu(pdu); |
| 1931 |
} |
| 1932 |
} |
| 1933 |
|
| 1934 |
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
| 1935 |
{
|
| 1936 |
if (debug_9p_pdu) {
|
| 1937 |
pprint_pdu(pdu); |
| 1938 |
} |
| 1939 |
} |
| 1940 |
|
| 1941 |
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
| 1942 |
|
| 1943 |
static pdu_handler_t *pdu_handlers[] = {
|
| 1944 |
[P9_TVERSION] = v9fs_version, |
| 1945 |
[P9_TATTACH] = v9fs_attach, |
| 1946 |
[P9_TSTAT] = v9fs_stat, |
| 1947 |
[P9_TWALK] = v9fs_walk, |
| 1948 |
[P9_TCLUNK] = v9fs_clunk, |
| 1949 |
[P9_TOPEN] = v9fs_open, |
| 1950 |
[P9_TREAD] = v9fs_read, |
| 1951 |
#if 0
|
| 1952 |
[P9_TAUTH] = v9fs_auth,
|
| 1953 |
#endif
|
| 1954 |
[P9_TFLUSH] = v9fs_flush, |
| 1955 |
[P9_TCREATE] = v9fs_create, |
| 1956 |
[P9_TWRITE] = v9fs_write, |
| 1957 |
[P9_TWSTAT] = v9fs_wstat, |
| 1958 |
[P9_TREMOVE] = v9fs_remove, |
| 1959 |
}; |
| 1960 |
|
| 1961 |
static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
| 1962 |
{
|
| 1963 |
pdu_handler_t *handler; |
| 1964 |
|
| 1965 |
if (debug_9p_pdu) {
|
| 1966 |
pprint_pdu(pdu); |
| 1967 |
} |
| 1968 |
|
| 1969 |
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); |
| 1970 |
|
| 1971 |
handler = pdu_handlers[pdu->id]; |
| 1972 |
BUG_ON(handler == NULL);
|
| 1973 |
|
| 1974 |
handler(s, pdu); |
| 1975 |
} |
| 1976 |
|
| 1977 |
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
| 1978 |
{
|
| 1979 |
V9fsState *s = (V9fsState *)vdev; |
| 1980 |
V9fsPDU *pdu; |
| 1981 |
ssize_t len; |
| 1982 |
|
| 1983 |
while ((pdu = alloc_pdu(s)) &&
|
| 1984 |
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
| 1985 |
uint8_t *ptr; |
| 1986 |
|
| 1987 |
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
| 1988 |
BUG_ON(pdu->elem.out_sg[0].iov_len < 7); |
| 1989 |
|
| 1990 |
ptr = pdu->elem.out_sg[0].iov_base;
|
| 1991 |
|
| 1992 |
memcpy(&pdu->size, ptr, 4);
|
| 1993 |
pdu->id = ptr[4];
|
| 1994 |
memcpy(&pdu->tag, ptr + 5, 2); |
| 1995 |
|
| 1996 |
submit_pdu(s, pdu); |
| 1997 |
} |
| 1998 |
|
| 1999 |
free_pdu(s, pdu); |
| 2000 |
} |
| 2001 |
|
| 2002 |
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
| 2003 |
{
|
| 2004 |
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
| 2005 |
return features;
|
| 2006 |
} |
| 2007 |
|
| 2008 |
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
| 2009 |
{
|
| 2010 |
return (V9fsState *)vdev;
|
| 2011 |
} |
| 2012 |
|
| 2013 |
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) |
| 2014 |
{
|
| 2015 |
struct virtio_9p_config *cfg;
|
| 2016 |
V9fsState *s = to_virtio_9p(vdev); |
| 2017 |
|
| 2018 |
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + |
| 2019 |
s->tag_len); |
| 2020 |
stw_raw(&cfg->tag_len, s->tag_len); |
| 2021 |
memcpy(cfg->tag, s->tag, s->tag_len); |
| 2022 |
memcpy(config, cfg, s->config_size); |
| 2023 |
qemu_free(cfg); |
| 2024 |
} |
| 2025 |
|
| 2026 |
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) |
| 2027 |
{
|
| 2028 |
V9fsState *s; |
| 2029 |
int i, len;
|
| 2030 |
struct stat stat;
|
| 2031 |
FsTypeEntry *fse; |
| 2032 |
|
| 2033 |
|
| 2034 |
s = (V9fsState *)virtio_common_init("virtio-9p",
|
| 2035 |
VIRTIO_ID_9P, |
| 2036 |
sizeof(struct virtio_9p_config)+ |
| 2037 |
MAX_TAG_LEN, |
| 2038 |
sizeof(V9fsState));
|
| 2039 |
|
| 2040 |
/* initialize pdu allocator */
|
| 2041 |
QLIST_INIT(&s->free_list); |
| 2042 |
for (i = 0; i < (MAX_REQ - 1); i++) { |
| 2043 |
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); |
| 2044 |
} |
| 2045 |
|
| 2046 |
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); |
| 2047 |
|
| 2048 |
fse = get_fsdev_fsentry(conf->fsdev_id); |
| 2049 |
|
| 2050 |
if (!fse) {
|
| 2051 |
/* We don't have a fsdev identified by fsdev_id */
|
| 2052 |
fprintf(stderr, "Virtio-9p device couldn't find fsdev "
|
| 2053 |
"with the id %s\n", conf->fsdev_id);
|
| 2054 |
exit(1);
|
| 2055 |
} |
| 2056 |
|
| 2057 |
if (!fse->path || !conf->tag) {
|
| 2058 |
/* we haven't specified a mount_tag or the path */
|
| 2059 |
fprintf(stderr, "fsdev with id %s needs path "
|
| 2060 |
"and Virtio-9p device needs mount_tag arguments\n",
|
| 2061 |
conf->fsdev_id); |
| 2062 |
exit(1);
|
| 2063 |
} |
| 2064 |
|
| 2065 |
if (lstat(fse->path, &stat)) {
|
| 2066 |
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
| 2067 |
exit(1);
|
| 2068 |
} else if (!S_ISDIR(stat.st_mode)) { |
| 2069 |
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
| 2070 |
exit(1);
|
| 2071 |
} |
| 2072 |
|
| 2073 |
s->ctx.fs_root = qemu_strdup(fse->path); |
| 2074 |
len = strlen(conf->tag); |
| 2075 |
if (len > MAX_TAG_LEN) {
|
| 2076 |
len = MAX_TAG_LEN; |
| 2077 |
} |
| 2078 |
/* s->tag is non-NULL terminated string */
|
| 2079 |
s->tag = qemu_malloc(len); |
| 2080 |
memcpy(s->tag, conf->tag, len); |
| 2081 |
s->tag_len = len; |
| 2082 |
s->ctx.uid = -1;
|
| 2083 |
|
| 2084 |
s->ops = fse->ops; |
| 2085 |
s->vdev.get_features = virtio_9p_get_features; |
| 2086 |
s->config_size = sizeof(struct virtio_9p_config) + |
| 2087 |
s->tag_len; |
| 2088 |
s->vdev.get_config = virtio_9p_get_config; |
| 2089 |
|
| 2090 |
return &s->vdev;
|
| 2091 |
} |