Don't do anything special for flush. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2376 lines
56 KiB
C
2376 lines
56 KiB
C
/*
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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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int dotu = 1;
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int debug_9p_pdu;
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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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}
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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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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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buf->data = qemu_malloc(1024);
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len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1);
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if (len > -1) {
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buf->size = len;
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buf->data[len] = 0;
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}
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return len;
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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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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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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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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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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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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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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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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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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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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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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 int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size)
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{
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return s->ops->truncate(&s->ctx, path->data, size);
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}
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static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath,
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V9fsString *newpath)
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{
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return s->ops->rename(&s->ctx, oldpath->data, newpath->data);
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}
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static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid)
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{
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return s->ops->chown(&s->ctx, path->data, uid, gid);
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}
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static int v9fs_do_utime(V9fsState *s, V9fsString *path,
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const struct utimbuf *buf)
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{
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return s->ops->utime(&s->ctx, path->data, buf);
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}
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static int v9fs_do_remove(V9fsState *s, V9fsString *path)
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{
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return s->ops->remove(&s->ctx, path->data);
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}
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static int v9fs_do_fsync(V9fsState *s, int fd)
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{
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return s->ops->fsync(&s->ctx, fd);
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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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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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f->next = s->fid_list;
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s->fid_list = f;
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return f;
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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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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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}
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if (*fidpp == NULL) {
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return -ENOENT;
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}
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fidp = *fidpp;
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*fidpp = fidp->next;
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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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return 0;
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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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#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
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#define P9_STAT_MODE_SYMLINK 0x02000000
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#define P9_STAT_MODE_LINK 0x01000000
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#define P9_STAT_MODE_DEVICE 0x00800000
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#define P9_STAT_MODE_NAMED_PIPE 0x00200000
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#define P9_STAT_MODE_SOCKET 0x00100000
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#define P9_STAT_MODE_SETUID 0x00080000
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#define P9_STAT_MODE_SETGID 0x00040000
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#define P9_STAT_MODE_SETVTX 0x00010000
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#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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/* This is the algorithm from ufs in spfs */
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static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp)
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{
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size_t size;
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size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path));
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memcpy(&qidp->path, &stbuf->st_ino, size);
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qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8);
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qidp->type = 0;
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if (S_ISDIR(stbuf->st_mode)) {
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qidp->type |= P9_QID_TYPE_DIR;
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}
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if (S_ISLNK(stbuf->st_mode)) {
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qidp->type |= P9_QID_TYPE_SYMLINK;
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}
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}
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static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp)
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{
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struct stat stbuf;
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int err;
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err = v9fs_do_lstat(s, &fidp->path, &stbuf);
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if (err) {
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return err;
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}
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stat_to_qid(&stbuf, qidp);
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return 0;
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}
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static V9fsPDU *alloc_pdu(V9fsState *s)
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{
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V9fsPDU *pdu = NULL;
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if (!QLIST_EMPTY(&s->free_list)) {
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pdu = QLIST_FIRST(&s->free_list);
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QLIST_REMOVE(pdu, next);
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}
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return pdu;
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}
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static void free_pdu(V9fsState *s, V9fsPDU *pdu)
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{
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if (pdu) {
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QLIST_INSERT_HEAD(&s->free_list, pdu, next);
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}
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}
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size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count,
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size_t offset, size_t size, int pack)
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{
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int i = 0;
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size_t copied = 0;
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for (i = 0; size && i < sg_count; i++) {
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size_t len;
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if (offset >= sg[i].iov_len) {
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/* skip this sg */
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offset -= sg[i].iov_len;
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continue;
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} else {
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len = MIN(sg[i].iov_len - offset, size);
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if (pack) {
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memcpy(sg[i].iov_base + offset, addr, len);
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} else {
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memcpy(addr, sg[i].iov_base + offset, len);
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}
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size -= len;
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copied += len;
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addr += len;
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if (size) {
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offset = 0;
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continue;
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}
|
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}
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}
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return copied;
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}
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|
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static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size)
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{
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return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num,
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offset, size, 0);
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}
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|
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static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src,
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size_t size)
|
|
{
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return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num,
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offset, size, 1);
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}
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|
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static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg)
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|
{
|
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size_t pos = 0;
|
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int i, j;
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struct iovec *src_sg;
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unsigned int num;
|
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|
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if (rx) {
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src_sg = pdu->elem.in_sg;
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num = pdu->elem.in_num;
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} else {
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src_sg = pdu->elem.out_sg;
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num = pdu->elem.out_num;
|
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}
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j = 0;
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for (i = 0; i < num; i++) {
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if (offset <= pos) {
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sg[j].iov_base = src_sg[i].iov_base;
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sg[j].iov_len = src_sg[i].iov_len;
|
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j++;
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} else if (offset < (src_sg[i].iov_len + pos)) {
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sg[j].iov_base = src_sg[i].iov_base;
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sg[j].iov_len = src_sg[i].iov_len;
|
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sg[j].iov_base += (offset - pos);
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sg[j].iov_len -= (offset - pos);
|
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j++;
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}
|
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pos += src_sg[i].iov_len;
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}
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|
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return j;
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}
|
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|
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static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
|
|
{
|
|
size_t old_offset = offset;
|
|
va_list ap;
|
|
int i;
|
|
|
|
va_start(ap, fmt);
|
|
for (i = 0; fmt[i]; i++) {
|
|
switch (fmt[i]) {
|
|
case 'b': {
|
|
uint8_t *valp = va_arg(ap, uint8_t *);
|
|
offset += pdu_unpack(valp, pdu, offset, sizeof(*valp));
|
|
break;
|
|
}
|
|
case 'w': {
|
|
uint16_t val, *valp;
|
|
valp = va_arg(ap, uint16_t *);
|
|
val = le16_to_cpupu(valp);
|
|
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
|
*valp = val;
|
|
break;
|
|
}
|
|
case 'd': {
|
|
uint32_t val, *valp;
|
|
valp = va_arg(ap, uint32_t *);
|
|
val = le32_to_cpupu(valp);
|
|
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
|
*valp = val;
|
|
break;
|
|
}
|
|
case 'q': {
|
|
uint64_t val, *valp;
|
|
valp = va_arg(ap, uint64_t *);
|
|
val = le64_to_cpup(valp);
|
|
offset += pdu_unpack(&val, pdu, offset, sizeof(val));
|
|
*valp = val;
|
|
break;
|
|
}
|
|
case 'v': {
|
|
struct iovec *iov = va_arg(ap, struct iovec *);
|
|
int *iovcnt = va_arg(ap, int *);
|
|
*iovcnt = pdu_copy_sg(pdu, offset, 0, iov);
|
|
break;
|
|
}
|
|
case 's': {
|
|
V9fsString *str = va_arg(ap, V9fsString *);
|
|
offset += pdu_unmarshal(pdu, offset, "w", &str->size);
|
|
/* FIXME: sanity check str->size */
|
|
str->data = qemu_malloc(str->size + 1);
|
|
offset += pdu_unpack(str->data, pdu, offset, str->size);
|
|
str->data[str->size] = 0;
|
|
break;
|
|
}
|
|
case 'Q': {
|
|
V9fsQID *qidp = va_arg(ap, V9fsQID *);
|
|
offset += pdu_unmarshal(pdu, offset, "bdq",
|
|
&qidp->type, &qidp->version, &qidp->path);
|
|
break;
|
|
}
|
|
case 'S': {
|
|
V9fsStat *statp = va_arg(ap, V9fsStat *);
|
|
offset += pdu_unmarshal(pdu, offset, "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;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
va_end(ap);
|
|
|
|
return offset - old_offset;
|
|
}
|
|
|
|
static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...)
|
|
{
|
|
size_t old_offset = offset;
|
|
va_list ap;
|
|
int i;
|
|
|
|
va_start(ap, fmt);
|
|
for (i = 0; fmt[i]; i++) {
|
|
switch (fmt[i]) {
|
|
case 'b': {
|
|
uint8_t val = va_arg(ap, int);
|
|
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
|
break;
|
|
}
|
|
case 'w': {
|
|
uint16_t val;
|
|
cpu_to_le16w(&val, va_arg(ap, int));
|
|
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
|
break;
|
|
}
|
|
case 'd': {
|
|
uint32_t val;
|
|
cpu_to_le32w(&val, va_arg(ap, uint32_t));
|
|
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
|
break;
|
|
}
|
|
case 'q': {
|
|
uint64_t val;
|
|
cpu_to_le64w(&val, va_arg(ap, uint64_t));
|
|
offset += pdu_pack(pdu, offset, &val, sizeof(val));
|
|
break;
|
|
}
|
|
case 'v': {
|
|
struct iovec *iov = va_arg(ap, struct iovec *);
|
|
int *iovcnt = va_arg(ap, int *);
|
|
*iovcnt = pdu_copy_sg(pdu, offset, 1, iov);
|
|
break;
|
|
}
|
|
case 's': {
|
|
V9fsString *str = va_arg(ap, V9fsString *);
|
|
offset += pdu_marshal(pdu, offset, "w", str->size);
|
|
offset += pdu_pack(pdu, offset, str->data, str->size);
|
|
break;
|
|
}
|
|
case 'Q': {
|
|
V9fsQID *qidp = va_arg(ap, V9fsQID *);
|
|
offset += pdu_marshal(pdu, offset, "bdq",
|
|
qidp->type, qidp->version, qidp->path);
|
|
break;
|
|
}
|
|
case 'S': {
|
|
V9fsStat *statp = va_arg(ap, V9fsStat *);
|
|
offset += pdu_marshal(pdu, offset, "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;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
va_end(ap);
|
|
|
|
return offset - old_offset;
|
|
}
|
|
|
|
static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len)
|
|
{
|
|
int8_t id = pdu->id + 1; /* Response */
|
|
|
|
if (len < 0) {
|
|
V9fsString str;
|
|
int err = -len;
|
|
|
|
str.data = strerror(err);
|
|
str.size = strlen(str.data);
|
|
|
|
len = 7;
|
|
len += pdu_marshal(pdu, len, "s", &str);
|
|
if (dotu) {
|
|
len += pdu_marshal(pdu, len, "d", err);
|
|
}
|
|
|
|
id = P9_RERROR;
|
|
}
|
|
|
|
/* fill out the header */
|
|
pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag);
|
|
|
|
/* keep these in sync */
|
|
pdu->size = len;
|
|
pdu->id = id;
|
|
|
|
/* push onto queue and notify */
|
|
virtqueue_push(s->vq, &pdu->elem, len);
|
|
|
|
/* FIXME: we should batch these completions */
|
|
virtio_notify(&s->vdev, s->vq);
|
|
|
|
free_pdu(s, pdu);
|
|
}
|
|
|
|
static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension)
|
|
{
|
|
mode_t ret;
|
|
|
|
ret = mode & 0777;
|
|
if (mode & P9_STAT_MODE_DIR) {
|
|
ret |= S_IFDIR;
|
|
}
|
|
|
|
if (dotu) {
|
|
if (mode & P9_STAT_MODE_SYMLINK) {
|
|
ret |= S_IFLNK;
|
|
}
|
|
if (mode & P9_STAT_MODE_SOCKET) {
|
|
ret |= S_IFSOCK;
|
|
}
|
|
if (mode & P9_STAT_MODE_NAMED_PIPE) {
|
|
ret |= S_IFIFO;
|
|
}
|
|
if (mode & P9_STAT_MODE_DEVICE) {
|
|
if (extension && extension->data[0] == 'c') {
|
|
ret |= S_IFCHR;
|
|
} else {
|
|
ret |= S_IFBLK;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!(ret&~0777)) {
|
|
ret |= S_IFREG;
|
|
}
|
|
|
|
if (mode & P9_STAT_MODE_SETUID) {
|
|
ret |= S_ISUID;
|
|
}
|
|
if (mode & P9_STAT_MODE_SETGID) {
|
|
ret |= S_ISGID;
|
|
}
|
|
if (mode & P9_STAT_MODE_SETVTX) {
|
|
ret |= S_ISVTX;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int donttouch_stat(V9fsStat *stat)
|
|
{
|
|
if (stat->type == -1 &&
|
|
stat->dev == -1 &&
|
|
stat->qid.type == -1 &&
|
|
stat->qid.version == -1 &&
|
|
stat->qid.path == -1 &&
|
|
stat->mode == -1 &&
|
|
stat->atime == -1 &&
|
|
stat->mtime == -1 &&
|
|
stat->length == -1 &&
|
|
!stat->name.size &&
|
|
!stat->uid.size &&
|
|
!stat->gid.size &&
|
|
!stat->muid.size &&
|
|
stat->n_uid == -1 &&
|
|
stat->n_gid == -1 &&
|
|
stat->n_muid == -1) {
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void v9fs_stat_free(V9fsStat *stat)
|
|
{
|
|
v9fs_string_free(&stat->name);
|
|
v9fs_string_free(&stat->uid);
|
|
v9fs_string_free(&stat->gid);
|
|
v9fs_string_free(&stat->muid);
|
|
v9fs_string_free(&stat->extension);
|
|
}
|
|
|
|
static uint32_t stat_to_v9mode(const struct stat *stbuf)
|
|
{
|
|
uint32_t mode;
|
|
|
|
mode = stbuf->st_mode & 0777;
|
|
if (S_ISDIR(stbuf->st_mode)) {
|
|
mode |= P9_STAT_MODE_DIR;
|
|
}
|
|
|
|
if (dotu) {
|
|
if (S_ISLNK(stbuf->st_mode)) {
|
|
mode |= P9_STAT_MODE_SYMLINK;
|
|
}
|
|
|
|
if (S_ISSOCK(stbuf->st_mode)) {
|
|
mode |= P9_STAT_MODE_SOCKET;
|
|
}
|
|
|
|
if (S_ISFIFO(stbuf->st_mode)) {
|
|
mode |= P9_STAT_MODE_NAMED_PIPE;
|
|
}
|
|
|
|
if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) {
|
|
mode |= P9_STAT_MODE_DEVICE;
|
|
}
|
|
|
|
if (stbuf->st_mode & S_ISUID) {
|
|
mode |= P9_STAT_MODE_SETUID;
|
|
}
|
|
|
|
if (stbuf->st_mode & S_ISGID) {
|
|
mode |= P9_STAT_MODE_SETGID;
|
|
}
|
|
|
|
if (stbuf->st_mode & S_ISVTX) {
|
|
mode |= P9_STAT_MODE_SETVTX;
|
|
}
|
|
}
|
|
|
|
return mode;
|
|
}
|
|
|
|
static int stat_to_v9stat(V9fsState *s, V9fsString *name,
|
|
const struct stat *stbuf,
|
|
V9fsStat *v9stat)
|
|
{
|
|
int err;
|
|
const char *str;
|
|
|
|
memset(v9stat, 0, sizeof(*v9stat));
|
|
|
|
stat_to_qid(stbuf, &v9stat->qid);
|
|
v9stat->mode = stat_to_v9mode(stbuf);
|
|
v9stat->atime = stbuf->st_atime;
|
|
v9stat->mtime = stbuf->st_mtime;
|
|
v9stat->length = stbuf->st_size;
|
|
|
|
v9fs_string_null(&v9stat->uid);
|
|
v9fs_string_null(&v9stat->gid);
|
|
v9fs_string_null(&v9stat->muid);
|
|
|
|
if (dotu) {
|
|
v9stat->n_uid = stbuf->st_uid;
|
|
v9stat->n_gid = stbuf->st_gid;
|
|
v9stat->n_muid = 0;
|
|
|
|
v9fs_string_null(&v9stat->extension);
|
|
|
|
if (v9stat->mode & P9_STAT_MODE_SYMLINK) {
|
|
err = v9fs_do_readlink(s, name, &v9stat->extension);
|
|
if (err == -1) {
|
|
err = -errno;
|
|
return err;
|
|
}
|
|
v9stat->extension.data[err] = 0;
|
|
v9stat->extension.size = err;
|
|
} else if (v9stat->mode & P9_STAT_MODE_DEVICE) {
|
|
v9fs_string_sprintf(&v9stat->extension, "%c %u %u",
|
|
S_ISCHR(stbuf->st_mode) ? 'c' : 'b',
|
|
major(stbuf->st_rdev), minor(stbuf->st_rdev));
|
|
} else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) {
|
|
v9fs_string_sprintf(&v9stat->extension, "%s %u",
|
|
"HARDLINKCOUNT", stbuf->st_nlink);
|
|
}
|
|
}
|
|
|
|
str = strrchr(name->data, '/');
|
|
if (str) {
|
|
str += 1;
|
|
} else {
|
|
str = name->data;
|
|
}
|
|
|
|
v9fs_string_sprintf(&v9stat->name, "%s", str);
|
|
|
|
v9stat->size = 61 +
|
|
v9fs_string_size(&v9stat->name) +
|
|
v9fs_string_size(&v9stat->uid) +
|
|
v9fs_string_size(&v9stat->gid) +
|
|
v9fs_string_size(&v9stat->muid) +
|
|
v9fs_string_size(&v9stat->extension);
|
|
return 0;
|
|
}
|
|
|
|
static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt)
|
|
{
|
|
while (len && *iovcnt) {
|
|
if (len < sg->iov_len) {
|
|
sg->iov_len -= len;
|
|
sg->iov_base += len;
|
|
len = 0;
|
|
} else {
|
|
len -= sg->iov_len;
|
|
sg++;
|
|
*iovcnt -= 1;
|
|
}
|
|
}
|
|
|
|
return sg;
|
|
}
|
|
|
|
static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt)
|
|
{
|
|
int i;
|
|
int total = 0;
|
|
|
|
for (i = 0; i < *cnt; i++) {
|
|
if ((total + sg[i].iov_len) > cap) {
|
|
sg[i].iov_len -= ((total + sg[i].iov_len) - cap);
|
|
i++;
|
|
break;
|
|
}
|
|
total += sg[i].iov_len;
|
|
}
|
|
|
|
*cnt = i;
|
|
|
|
return sg;
|
|
}
|
|
|
|
static void print_sg(struct iovec *sg, int cnt)
|
|
{
|
|
int i;
|
|
|
|
printf("sg[%d]: {", cnt);
|
|
for (i = 0; i < cnt; i++) {
|
|
if (i) {
|
|
printf(", ");
|
|
}
|
|
printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len);
|
|
}
|
|
printf("}\n");
|
|
}
|
|
|
|
static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len)
|
|
{
|
|
V9fsString str;
|
|
v9fs_string_init(&str);
|
|
v9fs_string_copy(&str, dst);
|
|
v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len);
|
|
v9fs_string_free(&str);
|
|
}
|
|
|
|
static void v9fs_version(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t msize;
|
|
V9fsString version;
|
|
size_t offset = 7;
|
|
|
|
pdu_unmarshal(pdu, offset, "ds", &msize, &version);
|
|
|
|
if (strcmp(version.data, "9P2000.u")) {
|
|
v9fs_string_sprintf(&version, "unknown");
|
|
}
|
|
|
|
offset += pdu_marshal(pdu, offset, "ds", msize, &version);
|
|
complete_pdu(s, pdu, offset);
|
|
|
|
v9fs_string_free(&version);
|
|
}
|
|
|
|
static void v9fs_attach(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid, afid, n_uname;
|
|
V9fsString uname, aname;
|
|
V9fsFidState *fidp;
|
|
V9fsQID qid;
|
|
size_t offset = 7;
|
|
ssize_t err;
|
|
|
|
pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname);
|
|
|
|
fidp = alloc_fid(s, fid);
|
|
if (fidp == NULL) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
fidp->uid = n_uname;
|
|
|
|
v9fs_string_sprintf(&fidp->path, "%s", "/");
|
|
err = fid_to_qid(s, fidp, &qid);
|
|
if (err) {
|
|
err = -EINVAL;
|
|
free_fid(s, fid);
|
|
goto out;
|
|
}
|
|
|
|
offset += pdu_marshal(pdu, offset, "Q", &qid);
|
|
|
|
err = offset;
|
|
out:
|
|
complete_pdu(s, pdu, err);
|
|
v9fs_string_free(&uname);
|
|
v9fs_string_free(&aname);
|
|
}
|
|
|
|
typedef struct V9fsStatState {
|
|
V9fsPDU *pdu;
|
|
size_t offset;
|
|
V9fsStat v9stat;
|
|
V9fsFidState *fidp;
|
|
struct stat stbuf;
|
|
} V9fsStatState;
|
|
|
|
static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err)
|
|
{
|
|
if (err == -1) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat);
|
|
if (err) {
|
|
goto out;
|
|
}
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat);
|
|
err = vs->offset;
|
|
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
v9fs_stat_free(&vs->v9stat);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_stat(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid;
|
|
V9fsStatState *vs;
|
|
ssize_t err = 0;
|
|
|
|
vs = qemu_malloc(sizeof(*vs));
|
|
vs->pdu = pdu;
|
|
vs->offset = 7;
|
|
|
|
memset(&vs->v9stat, 0, sizeof(vs->v9stat));
|
|
|
|
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
|
|
|
vs->fidp = lookup_fid(s, fid);
|
|
if (vs->fidp == NULL) {
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
|
v9fs_stat_post_lstat(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
v9fs_stat_free(&vs->v9stat);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
typedef struct V9fsWalkState {
|
|
V9fsPDU *pdu;
|
|
size_t offset;
|
|
int16_t nwnames;
|
|
int name_idx;
|
|
V9fsQID *qids;
|
|
V9fsFidState *fidp;
|
|
V9fsFidState *newfidp;
|
|
V9fsString path;
|
|
V9fsString *wnames;
|
|
struct stat stbuf;
|
|
} V9fsWalkState;
|
|
|
|
static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err)
|
|
{
|
|
complete_pdu(s, vs->pdu, err);
|
|
|
|
if (vs->nwnames) {
|
|
for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) {
|
|
v9fs_string_free(&vs->wnames[vs->name_idx]);
|
|
}
|
|
|
|
qemu_free(vs->wnames);
|
|
qemu_free(vs->qids);
|
|
}
|
|
}
|
|
|
|
static void v9fs_walk_marshal(V9fsWalkState *vs)
|
|
{
|
|
int i;
|
|
vs->offset = 7;
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames);
|
|
|
|
for (i = 0; i < vs->nwnames; i++) {
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]);
|
|
}
|
|
}
|
|
|
|
static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs,
|
|
int err)
|
|
{
|
|
if (err == -1) {
|
|
free_fid(s, vs->newfidp->fid);
|
|
v9fs_string_free(&vs->path);
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
|
|
|
|
vs->name_idx++;
|
|
if (vs->name_idx < vs->nwnames) {
|
|
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
|
vs->wnames[vs->name_idx].data);
|
|
v9fs_string_copy(&vs->newfidp->path, &vs->path);
|
|
|
|
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
|
|
v9fs_walk_post_newfid_lstat(s, vs, err);
|
|
return;
|
|
}
|
|
|
|
v9fs_string_free(&vs->path);
|
|
v9fs_walk_marshal(vs);
|
|
err = vs->offset;
|
|
out:
|
|
v9fs_walk_complete(s, vs, err);
|
|
}
|
|
|
|
static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs,
|
|
int err)
|
|
{
|
|
if (err == -1) {
|
|
v9fs_string_free(&vs->path);
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]);
|
|
vs->name_idx++;
|
|
if (vs->name_idx < vs->nwnames) {
|
|
|
|
v9fs_string_sprintf(&vs->path, "%s/%s",
|
|
vs->fidp->path.data, vs->wnames[vs->name_idx].data);
|
|
v9fs_string_copy(&vs->fidp->path, &vs->path);
|
|
|
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
|
v9fs_walk_post_oldfid_lstat(s, vs, err);
|
|
return;
|
|
}
|
|
|
|
v9fs_string_free(&vs->path);
|
|
v9fs_walk_marshal(vs);
|
|
err = vs->offset;
|
|
out:
|
|
v9fs_walk_complete(s, vs, err);
|
|
}
|
|
|
|
static void v9fs_walk(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid, newfid;
|
|
V9fsWalkState *vs;
|
|
int err = 0;
|
|
int i;
|
|
|
|
vs = qemu_malloc(sizeof(*vs));
|
|
vs->pdu = pdu;
|
|
vs->wnames = NULL;
|
|
vs->qids = NULL;
|
|
vs->offset = 7;
|
|
|
|
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid,
|
|
&newfid, &vs->nwnames);
|
|
|
|
if (vs->nwnames) {
|
|
vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames);
|
|
|
|
vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames);
|
|
|
|
for (i = 0; i < vs->nwnames; i++) {
|
|
vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s",
|
|
&vs->wnames[i]);
|
|
}
|
|
}
|
|
|
|
vs->fidp = lookup_fid(s, fid);
|
|
if (vs->fidp == NULL) {
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
/* FIXME: is this really valid? */
|
|
if (fid == newfid) {
|
|
|
|
BUG_ON(vs->fidp->fd != -1);
|
|
BUG_ON(vs->fidp->dir);
|
|
v9fs_string_init(&vs->path);
|
|
vs->name_idx = 0;
|
|
|
|
if (vs->name_idx < vs->nwnames) {
|
|
v9fs_string_sprintf(&vs->path, "%s/%s",
|
|
vs->fidp->path.data, vs->wnames[vs->name_idx].data);
|
|
v9fs_string_copy(&vs->fidp->path, &vs->path);
|
|
|
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
|
v9fs_walk_post_oldfid_lstat(s, vs, err);
|
|
return;
|
|
}
|
|
} else {
|
|
vs->newfidp = alloc_fid(s, newfid);
|
|
if (vs->newfidp == NULL) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
vs->newfidp->uid = vs->fidp->uid;
|
|
v9fs_string_init(&vs->path);
|
|
vs->name_idx = 0;
|
|
v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path);
|
|
|
|
if (vs->name_idx < vs->nwnames) {
|
|
v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data,
|
|
vs->wnames[vs->name_idx].data);
|
|
v9fs_string_copy(&vs->newfidp->path, &vs->path);
|
|
|
|
err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf);
|
|
v9fs_walk_post_newfid_lstat(s, vs, err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
v9fs_walk_marshal(vs);
|
|
err = vs->offset;
|
|
out:
|
|
v9fs_walk_complete(s, vs, err);
|
|
}
|
|
|
|
typedef struct V9fsOpenState {
|
|
V9fsPDU *pdu;
|
|
size_t offset;
|
|
int8_t mode;
|
|
V9fsFidState *fidp;
|
|
V9fsQID qid;
|
|
struct stat stbuf;
|
|
|
|
} V9fsOpenState;
|
|
|
|
enum {
|
|
Oread = 0x00,
|
|
Owrite = 0x01,
|
|
Ordwr = 0x02,
|
|
Oexec = 0x03,
|
|
Oexcl = 0x04,
|
|
Otrunc = 0x10,
|
|
Orexec = 0x20,
|
|
Orclose = 0x40,
|
|
Oappend = 0x80,
|
|
};
|
|
|
|
static int omode_to_uflags(int8_t mode)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (mode & 3) {
|
|
case Oread:
|
|
ret = O_RDONLY;
|
|
break;
|
|
case Ordwr:
|
|
ret = O_RDWR;
|
|
break;
|
|
case Owrite:
|
|
ret = O_WRONLY;
|
|
break;
|
|
case Oexec:
|
|
ret = O_RDONLY;
|
|
break;
|
|
}
|
|
|
|
if (mode & Otrunc) {
|
|
ret |= O_TRUNC;
|
|
}
|
|
|
|
if (mode & Oappend) {
|
|
ret |= O_APPEND;
|
|
}
|
|
|
|
if (mode & Oexcl) {
|
|
ret |= O_EXCL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err)
|
|
{
|
|
if (vs->fidp->dir == NULL) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0);
|
|
err = vs->offset;
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
|
|
}
|
|
|
|
static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err)
|
|
{
|
|
if (vs->fidp->fd == -1) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0);
|
|
err = vs->offset;
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err)
|
|
{
|
|
if (err) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
stat_to_qid(&vs->stbuf, &vs->qid);
|
|
|
|
if (S_ISDIR(vs->stbuf.st_mode)) {
|
|
vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path);
|
|
v9fs_open_post_opendir(s, vs, err);
|
|
} else {
|
|
vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path,
|
|
omode_to_uflags(vs->mode));
|
|
v9fs_open_post_open(s, vs, err);
|
|
}
|
|
return;
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_open(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid;
|
|
V9fsOpenState *vs;
|
|
ssize_t err = 0;
|
|
|
|
|
|
vs = qemu_malloc(sizeof(*vs));
|
|
vs->pdu = pdu;
|
|
vs->offset = 7;
|
|
|
|
pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode);
|
|
|
|
vs->fidp = lookup_fid(s, fid);
|
|
if (vs->fidp == NULL) {
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
BUG_ON(vs->fidp->fd != -1);
|
|
BUG_ON(vs->fidp->dir);
|
|
|
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
|
|
|
v9fs_open_post_lstat(s, vs, err);
|
|
return;
|
|
out:
|
|
complete_pdu(s, pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid;
|
|
size_t offset = 7;
|
|
int err;
|
|
|
|
pdu_unmarshal(pdu, offset, "d", &fid);
|
|
|
|
err = free_fid(s, fid);
|
|
if (err < 0) {
|
|
goto out;
|
|
}
|
|
|
|
offset = 7;
|
|
err = offset;
|
|
out:
|
|
complete_pdu(s, pdu, err);
|
|
}
|
|
|
|
typedef struct V9fsReadState {
|
|
V9fsPDU *pdu;
|
|
size_t offset;
|
|
int32_t count;
|
|
int32_t total;
|
|
int64_t off;
|
|
V9fsFidState *fidp;
|
|
struct iovec iov[128]; /* FIXME: bad, bad, bad */
|
|
struct iovec *sg;
|
|
off_t dir_pos;
|
|
struct dirent *dent;
|
|
struct stat stbuf;
|
|
V9fsString name;
|
|
V9fsStat v9stat;
|
|
int32_t len;
|
|
int32_t cnt;
|
|
int32_t max_count;
|
|
} V9fsReadState;
|
|
|
|
static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t);
|
|
|
|
static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
|
|
{
|
|
if (err) {
|
|
goto out;
|
|
}
|
|
v9fs_stat_free(&vs->v9stat);
|
|
v9fs_string_free(&vs->name);
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
|
vs->offset += vs->count;
|
|
err = vs->offset;
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
return;
|
|
}
|
|
|
|
static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs,
|
|
ssize_t err)
|
|
{
|
|
if (err) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat);
|
|
if (err) {
|
|
goto out;
|
|
}
|
|
|
|
vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S",
|
|
&vs->v9stat);
|
|
if ((vs->len != (vs->v9stat.size + 2)) ||
|
|
((vs->count + vs->len) > vs->max_count)) {
|
|
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos);
|
|
v9fs_read_post_seekdir(s, vs, err);
|
|
return;
|
|
}
|
|
vs->count += vs->len;
|
|
v9fs_stat_free(&vs->v9stat);
|
|
v9fs_string_free(&vs->name);
|
|
vs->dir_pos = vs->dent->d_off;
|
|
vs->dent = v9fs_do_readdir(s, vs->fidp->dir);
|
|
v9fs_read_post_readdir(s, vs, err);
|
|
return;
|
|
out:
|
|
v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos);
|
|
v9fs_read_post_seekdir(s, vs, err);
|
|
return;
|
|
|
|
}
|
|
|
|
static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err)
|
|
{
|
|
if (vs->dent) {
|
|
memset(&vs->v9stat, 0, sizeof(vs->v9stat));
|
|
v9fs_string_init(&vs->name);
|
|
v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data,
|
|
vs->dent->d_name);
|
|
err = v9fs_do_lstat(s, &vs->name, &vs->stbuf);
|
|
v9fs_read_post_dir_lstat(s, vs, err);
|
|
return;
|
|
}
|
|
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count);
|
|
vs->offset += vs->count;
|
|
err = vs->offset;
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
return;
|
|
}
|
|
|
|
static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err)
|
|
{
|
|
vs->dent = v9fs_do_readdir(s, vs->fidp->dir);
|
|
v9fs_read_post_readdir(s, vs, err);
|
|
return;
|
|
}
|
|
|
|
static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs,
|
|
ssize_t err)
|
|
{
|
|
vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir);
|
|
v9fs_read_post_telldir(s, vs, err);
|
|
return;
|
|
}
|
|
|
|
static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err)
|
|
{
|
|
if (err < 0) {
|
|
/* IO error return the error */
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
vs->total += vs->len;
|
|
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
|
|
if (vs->total < vs->count && vs->len > 0) {
|
|
do {
|
|
if (0) {
|
|
print_sg(vs->sg, vs->cnt);
|
|
}
|
|
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt);
|
|
} while (vs->len == -1 && errno == EINTR);
|
|
if (vs->len == -1) {
|
|
err = -errno;
|
|
}
|
|
v9fs_read_post_readv(s, vs, err);
|
|
return;
|
|
}
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
|
vs->offset += vs->count;
|
|
err = vs->offset;
|
|
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err)
|
|
{
|
|
if (err == -1) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
|
|
|
|
if (vs->total < vs->count) {
|
|
do {
|
|
if (0) {
|
|
print_sg(vs->sg, vs->cnt);
|
|
}
|
|
vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt);
|
|
} while (vs->len == -1 && errno == EINTR);
|
|
if (vs->len == -1) {
|
|
err = -errno;
|
|
}
|
|
v9fs_read_post_readv(s, vs, err);
|
|
return;
|
|
}
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_read(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid;
|
|
V9fsReadState *vs;
|
|
ssize_t err = 0;
|
|
|
|
vs = qemu_malloc(sizeof(*vs));
|
|
vs->pdu = pdu;
|
|
vs->offset = 7;
|
|
vs->total = 0;
|
|
vs->len = 0;
|
|
vs->count = 0;
|
|
|
|
pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count);
|
|
|
|
vs->fidp = lookup_fid(s, fid);
|
|
if (vs->fidp == NULL) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (vs->fidp->dir) {
|
|
vs->max_count = vs->count;
|
|
vs->count = 0;
|
|
if (vs->off == 0) {
|
|
v9fs_do_rewinddir(s, vs->fidp->dir);
|
|
}
|
|
v9fs_read_post_rewinddir(s, vs, err);
|
|
return;
|
|
} else if (vs->fidp->fd != -1) {
|
|
vs->sg = vs->iov;
|
|
pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt);
|
|
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET);
|
|
v9fs_read_post_lseek(s, vs, err);
|
|
return;
|
|
} else {
|
|
err = -EINVAL;
|
|
}
|
|
out:
|
|
complete_pdu(s, pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
typedef struct V9fsWriteState {
|
|
V9fsPDU *pdu;
|
|
size_t offset;
|
|
int32_t len;
|
|
int32_t count;
|
|
int32_t total;
|
|
int64_t off;
|
|
V9fsFidState *fidp;
|
|
struct iovec iov[128]; /* FIXME: bad, bad, bad */
|
|
struct iovec *sg;
|
|
int cnt;
|
|
} V9fsWriteState;
|
|
|
|
static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs,
|
|
ssize_t err)
|
|
{
|
|
if (err < 0) {
|
|
/* IO error return the error */
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
vs->total += vs->len;
|
|
vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt);
|
|
if (vs->total < vs->count && vs->len > 0) {
|
|
do {
|
|
if (0) {
|
|
print_sg(vs->sg, vs->cnt);
|
|
}
|
|
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt);
|
|
} while (vs->len == -1 && errno == EINTR);
|
|
if (vs->len == -1) {
|
|
err = -errno;
|
|
}
|
|
v9fs_write_post_writev(s, vs, err);
|
|
return;
|
|
}
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total);
|
|
|
|
err = vs->offset;
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err)
|
|
{
|
|
if (err == -1) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt);
|
|
|
|
if (vs->total < vs->count) {
|
|
do {
|
|
if (0) {
|
|
print_sg(vs->sg, vs->cnt);
|
|
}
|
|
vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt);
|
|
} while (vs->len == -1 && errno == EINTR);
|
|
if (vs->len == -1) {
|
|
err = -errno;
|
|
}
|
|
v9fs_write_post_writev(s, vs, err);
|
|
return;
|
|
}
|
|
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_write(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid;
|
|
V9fsWriteState *vs;
|
|
ssize_t err;
|
|
|
|
vs = qemu_malloc(sizeof(*vs));
|
|
|
|
vs->pdu = pdu;
|
|
vs->offset = 7;
|
|
vs->sg = vs->iov;
|
|
vs->total = 0;
|
|
vs->len = 0;
|
|
|
|
pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count,
|
|
vs->sg, &vs->cnt);
|
|
|
|
vs->fidp = lookup_fid(s, fid);
|
|
if (vs->fidp == NULL) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (vs->fidp->fd == -1) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET);
|
|
|
|
v9fs_write_post_lseek(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
typedef struct V9fsCreateState {
|
|
V9fsPDU *pdu;
|
|
size_t offset;
|
|
V9fsFidState *fidp;
|
|
V9fsQID qid;
|
|
int32_t perm;
|
|
int8_t mode;
|
|
struct stat stbuf;
|
|
V9fsString name;
|
|
V9fsString extension;
|
|
V9fsString fullname;
|
|
} V9fsCreateState;
|
|
|
|
static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err)
|
|
{
|
|
if (err == 0) {
|
|
v9fs_string_copy(&vs->fidp->path, &vs->fullname);
|
|
stat_to_qid(&vs->stbuf, &vs->qid);
|
|
|
|
vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0);
|
|
|
|
err = vs->offset;
|
|
}
|
|
|
|
complete_pdu(s, vs->pdu, err);
|
|
v9fs_string_free(&vs->name);
|
|
v9fs_string_free(&vs->extension);
|
|
v9fs_string_free(&vs->fullname);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err)
|
|
{
|
|
if (err) {
|
|
err = -errno;
|
|
}
|
|
v9fs_post_create(s, vs, err);
|
|
}
|
|
|
|
static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs,
|
|
int err)
|
|
{
|
|
if (!vs->fidp->dir) {
|
|
err = -errno;
|
|
}
|
|
v9fs_post_create(s, vs, err);
|
|
}
|
|
|
|
static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs,
|
|
int err)
|
|
{
|
|
if (err) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname);
|
|
v9fs_create_post_opendir(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
v9fs_post_create(s, vs, err);
|
|
}
|
|
|
|
static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err)
|
|
{
|
|
if (err) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
|
|
v9fs_create_post_dir_lstat(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
v9fs_post_create(s, vs, err);
|
|
}
|
|
|
|
static void v9fs_create_post_mksock(V9fsState *s, V9fsCreateState *vs,
|
|
int err)
|
|
{
|
|
if (err) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
err = v9fs_do_chmod(s, &vs->fullname, vs->perm & 0777);
|
|
v9fs_create_post_perms(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
v9fs_post_create(s, vs, err);
|
|
}
|
|
|
|
static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err)
|
|
{
|
|
if (err) {
|
|
vs->fidp->fd = -1;
|
|
err = -errno;
|
|
}
|
|
|
|
v9fs_post_create(s, vs, err);
|
|
return;
|
|
}
|
|
|
|
static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err)
|
|
{
|
|
if (vs->fidp->fd == -1) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf);
|
|
v9fs_create_post_fstat(s, vs, err);
|
|
|
|
return;
|
|
|
|
out:
|
|
v9fs_post_create(s, vs, err);
|
|
|
|
}
|
|
|
|
static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err)
|
|
{
|
|
|
|
if (err == 0 || errno != ENOENT) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
if (vs->perm & P9_STAT_MODE_DIR) {
|
|
err = v9fs_do_mkdir(s, &vs->fullname, vs->perm & 0777);
|
|
v9fs_create_post_mkdir(s, vs, err);
|
|
} else if (vs->perm & P9_STAT_MODE_SYMLINK) {
|
|
err = v9fs_do_symlink(s, &vs->extension, &vs->fullname);
|
|
v9fs_create_post_perms(s, vs, err);
|
|
} else if (vs->perm & P9_STAT_MODE_LINK) {
|
|
int32_t nfid = atoi(vs->extension.data);
|
|
V9fsFidState *nfidp = lookup_fid(s, nfid);
|
|
if (nfidp == NULL) {
|
|
err = -errno;
|
|
v9fs_post_create(s, vs, err);
|
|
}
|
|
err = v9fs_do_link(s, &nfidp->path, &vs->fullname);
|
|
v9fs_create_post_perms(s, vs, err);
|
|
} else if (vs->perm & P9_STAT_MODE_DEVICE) {
|
|
char ctype;
|
|
uint32_t major, minor;
|
|
mode_t nmode = 0;
|
|
|
|
if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major,
|
|
&minor) != 3) {
|
|
err = -errno;
|
|
v9fs_post_create(s, vs, err);
|
|
}
|
|
|
|
switch (ctype) {
|
|
case 'c':
|
|
nmode = S_IFCHR;
|
|
break;
|
|
case 'b':
|
|
nmode = S_IFBLK;
|
|
break;
|
|
default:
|
|
err = -EIO;
|
|
v9fs_post_create(s, vs, err);
|
|
}
|
|
|
|
nmode |= vs->perm & 0777;
|
|
err = v9fs_do_mknod(s, &vs->fullname, nmode, makedev(major, minor));
|
|
v9fs_create_post_perms(s, vs, err);
|
|
} else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) {
|
|
err = v9fs_do_mknod(s, &vs->fullname, S_IFIFO | (vs->mode & 0777), 0);
|
|
v9fs_post_create(s, vs, err);
|
|
} else if (vs->perm & P9_STAT_MODE_SOCKET) {
|
|
err = v9fs_do_mksock(s, &vs->fullname);
|
|
v9fs_create_post_mksock(s, vs, err);
|
|
} else {
|
|
vs->fidp->fd = v9fs_do_open2(s, &vs->fullname,
|
|
omode_to_uflags(vs->mode) | O_CREAT,
|
|
vs->perm & 0777);
|
|
v9fs_create_post_open2(s, vs, err);
|
|
}
|
|
|
|
return;
|
|
|
|
out:
|
|
v9fs_post_create(s, vs, err);
|
|
}
|
|
|
|
static void v9fs_create(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid;
|
|
V9fsCreateState *vs;
|
|
int err = 0;
|
|
|
|
vs = qemu_malloc(sizeof(*vs));
|
|
vs->pdu = pdu;
|
|
vs->offset = 7;
|
|
|
|
v9fs_string_init(&vs->fullname);
|
|
|
|
pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name,
|
|
&vs->perm, &vs->mode, &vs->extension);
|
|
|
|
vs->fidp = lookup_fid(s, fid);
|
|
if (vs->fidp == NULL) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data,
|
|
vs->name.data);
|
|
|
|
err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf);
|
|
v9fs_create_post_lstat(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
v9fs_string_free(&vs->name);
|
|
v9fs_string_free(&vs->extension);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_flush(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
/* A nop call with no return */
|
|
complete_pdu(s, pdu, 7);
|
|
}
|
|
|
|
typedef struct V9fsRemoveState {
|
|
V9fsPDU *pdu;
|
|
size_t offset;
|
|
V9fsFidState *fidp;
|
|
} V9fsRemoveState;
|
|
|
|
static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs,
|
|
int err)
|
|
{
|
|
/* For TREMOVE we need to clunk the fid even on failed remove */
|
|
err = free_fid(s, vs->fidp->fid);
|
|
if (err < 0) {
|
|
goto out;
|
|
}
|
|
|
|
err = vs->offset;
|
|
out:
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_remove(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid;
|
|
V9fsRemoveState *vs;
|
|
int err = 0;
|
|
|
|
vs = qemu_malloc(sizeof(*vs));
|
|
vs->pdu = pdu;
|
|
vs->offset = 7;
|
|
|
|
pdu_unmarshal(vs->pdu, vs->offset, "d", &fid);
|
|
|
|
vs->fidp = lookup_fid(s, fid);
|
|
if (vs->fidp == NULL) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
err = v9fs_do_remove(s, &vs->fidp->path);
|
|
v9fs_remove_post_remove(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
complete_pdu(s, pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
typedef struct V9fsWstatState
|
|
{
|
|
V9fsPDU *pdu;
|
|
size_t offset;
|
|
int16_t unused;
|
|
V9fsStat v9stat;
|
|
V9fsFidState *fidp;
|
|
struct stat stbuf;
|
|
V9fsString nname;
|
|
} V9fsWstatState;
|
|
|
|
static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err)
|
|
{
|
|
if (err < 0) {
|
|
goto out;
|
|
}
|
|
|
|
err = vs->offset;
|
|
|
|
out:
|
|
v9fs_stat_free(&vs->v9stat);
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err)
|
|
{
|
|
if (err < 0) {
|
|
goto out;
|
|
}
|
|
|
|
if (vs->v9stat.name.size != 0) {
|
|
v9fs_string_free(&vs->nname);
|
|
}
|
|
|
|
if (vs->v9stat.length != -1) {
|
|
if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) {
|
|
err = -errno;
|
|
}
|
|
}
|
|
v9fs_wstat_post_truncate(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
v9fs_stat_free(&vs->v9stat);
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err)
|
|
{
|
|
V9fsFidState *fidp;
|
|
if (err < 0) {
|
|
goto out;
|
|
}
|
|
|
|
if (vs->v9stat.name.size != 0) {
|
|
char *old_name, *new_name;
|
|
char *end;
|
|
|
|
old_name = vs->fidp->path.data;
|
|
end = strrchr(old_name, '/');
|
|
if (end) {
|
|
end++;
|
|
} else {
|
|
end = old_name;
|
|
}
|
|
|
|
new_name = qemu_malloc(end - old_name + vs->v9stat.name.size + 1);
|
|
|
|
memset(new_name, 0, end - old_name + vs->v9stat.name.size + 1);
|
|
memcpy(new_name, old_name, end - old_name);
|
|
memcpy(new_name + (end - old_name), vs->v9stat.name.data,
|
|
vs->v9stat.name.size);
|
|
vs->nname.data = new_name;
|
|
vs->nname.size = strlen(new_name);
|
|
|
|
if (strcmp(new_name, vs->fidp->path.data) != 0) {
|
|
if (v9fs_do_rename(s, &vs->fidp->path, &vs->nname)) {
|
|
err = -errno;
|
|
} else {
|
|
/*
|
|
* Fixup fid's pointing to the old name to
|
|
* start pointing to the new name
|
|
*/
|
|
for (fidp = s->fid_list; fidp; fidp = fidp->next) {
|
|
|
|
if (vs->fidp == fidp) {
|
|
/*
|
|
* we replace name of this fid towards the end
|
|
* so that our below strcmp will work
|
|
*/
|
|
continue;
|
|
}
|
|
if (!strncmp(vs->fidp->path.data, fidp->path.data,
|
|
strlen(vs->fidp->path.data))) {
|
|
/* replace the name */
|
|
v9fs_fix_path(&fidp->path, &vs->nname,
|
|
strlen(vs->fidp->path.data));
|
|
}
|
|
}
|
|
v9fs_string_copy(&vs->fidp->path, &vs->nname);
|
|
}
|
|
}
|
|
}
|
|
v9fs_wstat_post_rename(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
v9fs_stat_free(&vs->v9stat);
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err)
|
|
{
|
|
if (err < 0) {
|
|
goto out;
|
|
}
|
|
|
|
if (vs->v9stat.n_gid != -1) {
|
|
if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid,
|
|
vs->v9stat.n_gid)) {
|
|
err = -errno;
|
|
}
|
|
}
|
|
v9fs_wstat_post_chown(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
v9fs_stat_free(&vs->v9stat);
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err)
|
|
{
|
|
if (err < 0) {
|
|
goto out;
|
|
}
|
|
|
|
if (vs->v9stat.mtime != -1) {
|
|
struct utimbuf tb;
|
|
tb.actime = 0;
|
|
tb.modtime = vs->v9stat.mtime;
|
|
if (v9fs_do_utime(s, &vs->fidp->path, &tb)) {
|
|
err = -errno;
|
|
}
|
|
}
|
|
|
|
v9fs_wstat_post_utime(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
v9fs_stat_free(&vs->v9stat);
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err)
|
|
{
|
|
if (err == -1) {
|
|
err = -errno;
|
|
}
|
|
v9fs_stat_free(&vs->v9stat);
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err)
|
|
{
|
|
uint32_t v9_mode;
|
|
|
|
if (err == -1) {
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
|
|
v9_mode = stat_to_v9mode(&vs->stbuf);
|
|
|
|
if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) !=
|
|
(v9_mode & P9_STAT_MODE_TYPE_BITS)) {
|
|
/* Attempting to change the type */
|
|
err = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode,
|
|
&vs->v9stat.extension))) {
|
|
err = -errno;
|
|
}
|
|
v9fs_wstat_post_chmod(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
v9fs_stat_free(&vs->v9stat);
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
int32_t fid;
|
|
V9fsWstatState *vs;
|
|
int err = 0;
|
|
|
|
vs = qemu_malloc(sizeof(*vs));
|
|
vs->pdu = pdu;
|
|
vs->offset = 7;
|
|
|
|
pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat);
|
|
|
|
vs->fidp = lookup_fid(s, fid);
|
|
if (vs->fidp == NULL) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* do we need to sync the file? */
|
|
if (donttouch_stat(&vs->v9stat)) {
|
|
err = v9fs_do_fsync(s, vs->fidp->fd);
|
|
v9fs_wstat_post_fsync(s, vs, err);
|
|
return;
|
|
}
|
|
|
|
if (vs->v9stat.mode != -1) {
|
|
err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf);
|
|
v9fs_wstat_post_lstat(s, vs, err);
|
|
return;
|
|
}
|
|
|
|
v9fs_wstat_post_chmod(s, vs, err);
|
|
return;
|
|
|
|
out:
|
|
v9fs_stat_free(&vs->v9stat);
|
|
complete_pdu(s, vs->pdu, err);
|
|
qemu_free(vs);
|
|
}
|
|
|
|
typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu);
|
|
|
|
static pdu_handler_t *pdu_handlers[] = {
|
|
[P9_TVERSION] = v9fs_version,
|
|
[P9_TATTACH] = v9fs_attach,
|
|
[P9_TSTAT] = v9fs_stat,
|
|
[P9_TWALK] = v9fs_walk,
|
|
[P9_TCLUNK] = v9fs_clunk,
|
|
[P9_TOPEN] = v9fs_open,
|
|
[P9_TREAD] = v9fs_read,
|
|
#if 0
|
|
[P9_TAUTH] = v9fs_auth,
|
|
#endif
|
|
[P9_TFLUSH] = v9fs_flush,
|
|
[P9_TCREATE] = v9fs_create,
|
|
[P9_TWRITE] = v9fs_write,
|
|
[P9_TWSTAT] = v9fs_wstat,
|
|
[P9_TREMOVE] = v9fs_remove,
|
|
};
|
|
|
|
static void submit_pdu(V9fsState *s, V9fsPDU *pdu)
|
|
{
|
|
pdu_handler_t *handler;
|
|
|
|
if (debug_9p_pdu) {
|
|
pprint_pdu(pdu);
|
|
}
|
|
|
|
BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers));
|
|
|
|
handler = pdu_handlers[pdu->id];
|
|
BUG_ON(handler == NULL);
|
|
|
|
handler(s, pdu);
|
|
}
|
|
|
|
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
|
|
{
|
|
V9fsState *s = (V9fsState *)vdev;
|
|
V9fsPDU *pdu;
|
|
ssize_t len;
|
|
|
|
while ((pdu = alloc_pdu(s)) &&
|
|
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
|
|
uint8_t *ptr;
|
|
|
|
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
|
|
BUG_ON(pdu->elem.out_sg[0].iov_len < 7);
|
|
|
|
ptr = pdu->elem.out_sg[0].iov_base;
|
|
|
|
memcpy(&pdu->size, ptr, 4);
|
|
pdu->id = ptr[4];
|
|
memcpy(&pdu->tag, ptr + 5, 2);
|
|
|
|
submit_pdu(s, pdu);
|
|
}
|
|
|
|
free_pdu(s, pdu);
|
|
}
|
|
|
|
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
|
{
|
|
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
|
return features;
|
|
}
|
|
|
|
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
|
{
|
|
return (V9fsState *)vdev;
|
|
}
|
|
|
|
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
|
|
{
|
|
struct virtio_9p_config *cfg;
|
|
V9fsState *s = to_virtio_9p(vdev);
|
|
|
|
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) +
|
|
s->tag_len);
|
|
stw_raw(&cfg->tag_len, s->tag_len);
|
|
memcpy(cfg->tag, s->tag, s->tag_len);
|
|
memcpy(config, cfg, s->config_size);
|
|
qemu_free(cfg);
|
|
}
|
|
|
|
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
|
|
{
|
|
V9fsState *s;
|
|
int i, len;
|
|
struct stat stat;
|
|
FsTypeEntry *fse;
|
|
|
|
|
|
s = (V9fsState *)virtio_common_init("virtio-9p",
|
|
VIRTIO_ID_9P,
|
|
sizeof(struct virtio_9p_config)+
|
|
MAX_TAG_LEN,
|
|
sizeof(V9fsState));
|
|
|
|
/* initialize pdu allocator */
|
|
QLIST_INIT(&s->free_list);
|
|
for (i = 0; i < (MAX_REQ - 1); i++) {
|
|
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
|
|
}
|
|
|
|
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
|
|
|
|
fse = get_fsdev_fsentry(conf->fsdev_id);
|
|
|
|
if (!fse) {
|
|
/* We don't have a fsdev identified by fsdev_id */
|
|
fprintf(stderr, "Virtio-9p device couldn't find fsdev "
|
|
"with the id %s\n", conf->fsdev_id);
|
|
exit(1);
|
|
}
|
|
|
|
if (!fse->path || !conf->tag) {
|
|
/* we haven't specified a mount_tag or the path */
|
|
fprintf(stderr, "fsdev with id %s needs path "
|
|
"and Virtio-9p device needs mount_tag arguments\n",
|
|
conf->fsdev_id);
|
|
exit(1);
|
|
}
|
|
|
|
if (lstat(fse->path, &stat)) {
|
|
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
|
exit(1);
|
|
} else if (!S_ISDIR(stat.st_mode)) {
|
|
fprintf(stderr, "share path %s is not a directory \n", fse->path);
|
|
exit(1);
|
|
}
|
|
|
|
s->ctx.fs_root = qemu_strdup(fse->path);
|
|
len = strlen(conf->tag);
|
|
if (len > MAX_TAG_LEN) {
|
|
len = MAX_TAG_LEN;
|
|
}
|
|
/* s->tag is non-NULL terminated string */
|
|
s->tag = qemu_malloc(len);
|
|
memcpy(s->tag, conf->tag, len);
|
|
s->tag_len = len;
|
|
s->ctx.uid = -1;
|
|
|
|
s->ops = fse->ops;
|
|
s->vdev.get_features = virtio_9p_get_features;
|
|
s->config_size = sizeof(struct virtio_9p_config) +
|
|
s->tag_len;
|
|
s->vdev.get_config = virtio_9p_get_config;
|
|
|
|
return &s->vdev;
|
|
}
|