hw/9pfs/cofs.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_readlink(V9fsState *s, V9fsString *path, V9fsString *buf)
  21 {
  22     int err;
  23     ssize_t len;
  24
  25     buf->data = g_malloc(PATH_MAX);
  26     v9fs_co_run_in_worker(
  27         {
  28             len = s->ops->readlink(&s->ctx, path->data,
  29                                    buf->data, PATH_MAX - 1);
  30             if (len > -1) {
  31                 buf->size = len;
  32                 buf->data[len] = 0;
  33                 err = 0;
  34             } else {
  35                 err = -errno;
  36             }
  37         });
  38     if (err) {
  39         g_free(buf->data);
  40         buf->data = NULL;
  41         buf->size = 0;
  42     }
  43     return err;
  44 }
  45
  46 int v9fs_co_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf)
  47 {
  48     int err;
  49
  50     v9fs_co_run_in_worker(
  51         {
  52             err = s->ops->statfs(&s->ctx, path->data, stbuf);
  53             if (err < 0) {
  54                 err = -errno;
  55             }
  56         });
  57     return err;
  58 }
  59
  60 int v9fs_co_chmod(V9fsState *s, V9fsString *path, mode_t mode)
  61 {
  62     int err;
  63     FsCred cred;
  64
  65     cred_init(&cred);
  66     cred.fc_mode = mode;
  67     v9fs_co_run_in_worker(
  68         {
  69             err = s->ops->chmod(&s->ctx, path->data, &cred);
  70             if (err < 0) {
  71                 err = -errno;
  72             }
  73         });
  74     return err;
  75 }
  76
  77 int v9fs_co_utimensat(V9fsState *s, V9fsString *path,
  78                       struct timespec times[2])
  79 {
  80     int err;
  81
  82     v9fs_co_run_in_worker(
  83         {
  84             err = s->ops->utimensat(&s->ctx, path->data, times);
  85             if (err < 0) {
  86                 err = -errno;
  87             }
  88         });
  89     return err;
  90 }
  91
  92 int v9fs_co_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid)
  93 {
  94     int err;
  95     FsCred cred;
  96
  97     cred_init(&cred);
  98     cred.fc_uid = uid;
  99     cred.fc_gid = gid;
 100     v9fs_co_run_in_worker(
 101         {
 102             err = s->ops->chown(&s->ctx, path->data, &cred);
 103             if (err < 0) {
 104                 err = -errno;
 105             }
 106         });
 107     return err;
 108 }
 109
 110 int v9fs_co_truncate(V9fsState *s, V9fsString *path, off_t size)
 111 {
 112     int err;
 113
 114     v9fs_co_run_in_worker(
 115         {
 116             err = s->ops->truncate(&s->ctx, path->data, size);
 117             if (err < 0) {
 118                 err = -errno;
 119             }
 120         });
 121     return err;
 122 }
 123
 124 int v9fs_co_mknod(V9fsState *s, V9fsString *path, uid_t uid,
 125                   gid_t gid, dev_t dev, mode_t mode)
 126 {
 127     int err;
 128     FsCred cred;
 129
 130     cred_init(&cred);
 131     cred.fc_uid  = uid;
 132     cred.fc_gid  = gid;
 133     cred.fc_mode = mode;
 134     cred.fc_rdev = dev;
 135     v9fs_co_run_in_worker(
 136         {
 137             err = s->ops->mknod(&s->ctx, path->data, &cred);
 138             if (err < 0) {
 139                 err = -errno;
 140             }
 141         });
 142     return err;
 143 }
 144
 145 int v9fs_co_remove(V9fsState *s, V9fsString *path)
 146 {
 147     int err;
 148
 149     v9fs_co_run_in_worker(
 150         {
 151             err = s->ops->remove(&s->ctx, path->data);
 152             if (err < 0) {
 153                 err = -errno;
 154             }
 155         });
 156     return err;
 157 }
 158
 159 int v9fs_co_rename(V9fsState *s, V9fsString *oldpath, V9fsString *newpath)
 160 {
 161     int err;
 162
 163     v9fs_co_run_in_worker(
 164         {
 165             err = s->ops->rename(&s->ctx, oldpath->data, newpath->data);
 166             if (err < 0) {
 167                 err = -errno;
 168             }
 169         });
 170     return err;
 171 }