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_r(V9fsState *s, V9fsFidState *fidp, struct dirent *dent,
  21                       struct dirent **result)
  22 {
  23     int err;
  24
  25     v9fs_co_run_in_worker(
  26         {
  27             errno = 0;
  28             err = s->ops->readdir_r(&s->ctx, fidp->fs.dir, dent, result);
  29             if (!*result && 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 }
  67
  68 int v9fs_co_mkdir(V9fsState *s, char *name, mode_t mode, uid_t uid, gid_t gid)
  69 {
  70     int err;
  71     FsCred cred;
  72
  73     cred_init(&cred);
  74     cred.fc_mode = mode;
  75     cred.fc_uid = uid;
  76     cred.fc_gid = gid;
  77     v9fs_co_run_in_worker(
  78         {
  79             err = s->ops->mkdir(&s->ctx, name, &cred);
  80             if (err < 0) {
  81                 err = -errno;
  82             }
  83         });
  84     return err;
  85 }
  86
  87 int v9fs_co_opendir(V9fsState *s, V9fsFidState *fidp)
  88 {
  89     int err;
  90
  91     v9fs_co_run_in_worker(
  92         {
  93             fidp->fs.dir = s->ops->opendir(&s->ctx, fidp->path.data);
  94             if (!fidp->fs.dir) {
  95                 err = -errno;
  96             } else {
  97                 err = 0;
  98             }
  99         });
 100     if (!err) {
 101         total_open_fd++;
 102         if (total_open_fd > open_fd_hw) {
 103             v9fs_reclaim_fd(s);
 104         }
 105     }
 106     return err;
 107 }
 108
 109 int v9fs_co_closedir(V9fsState *s, DIR *dir)
 110 {
 111     int err;
 112
 113     v9fs_co_run_in_worker(
 114         {
 115             err = s->ops->closedir(&s->ctx, dir);
 116             if (err < 0) {
 117                 err = -errno;
 118             }
 119         });
 120     if (!err) {
 121         total_open_fd--;
 122     }
 123     return err;
 124 }