hw/9pfs/codir.c

   1
   2 /*
   3  * Virtio 9p backend
   4  *
   5  * Copyright IBM, Corp. 2011
   6  *
   7  * Authors:
   8  *  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2.  See
  11  * the COPYING file in the top-level directory.
  12  *
  13  */
  14
  15 #include "fsdev/qemu-fsdev.h"
  16 #include "qemu-thread.h"
  17 #include "qemu-coroutine.h"
  18 #include "virtio-9p-coth.h"
  19
  20 int v9fs_co_readdir(V9fsState *s, V9fsFidState *fidp, struct dirent **dent)
  21 {
  22     int err;
  23
  24     v9fs_co_run_in_worker(
  25         {
  26             errno = 0;
  27             /*FIXME!! need to switch to readdir_r */
  28             *dent = s->ops->readdir(&s->ctx, fidp->fs.dir);
  29             if (!*dent && errno) {
  30                 err = -errno;
  31             } else {
  32                 err = 0;
  33             }
  34         });
  35     return err;
  36 }
  37
  38 off_t v9fs_co_telldir(V9fsState *s, V9fsFidState *fidp)
  39 {
  40     off_t err;
  41
  42     v9fs_co_run_in_worker(
  43         {
  44             err = s->ops->telldir(&s->ctx, fidp->fs.dir);
  45             if (err < 0) {
  46                 err = -errno;
  47             }
  48         });
  49     return err;
  50 }
  51
  52 void v9fs_co_seekdir(V9fsState *s, V9fsFidState *fidp, off_t offset)
  53 {
  54     v9fs_co_run_in_worker(
  55         {
  56             s->ops->seekdir(&s->ctx, fidp->fs.dir, offset);
  57         });
  58 }
  59
  60 void v9fs_co_rewinddir(V9fsState *s, V9fsFidState *fidp)
  61 {
  62     v9fs_co_run_in_worker(
  63         {
  64             s->ops->rewinddir(&s->ctx, fidp->fs.dir);
  65         });
  66 }