hw/9pfs/cofile.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_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf)
  21 {
  22     int err;
  23
  24     v9fs_co_run_in_worker(
  25         {
  26             err = s->ops->lstat(&s->ctx, path->data, stbuf);
  27             if (err < 0) {
  28                 err = -errno;
  29             }
  30         });
  31     return err;
  32 }
  33
  34 int v9fs_co_fstat(V9fsState *s, int fd, struct stat *stbuf)
  35 {
  36     int err;
  37
  38     v9fs_co_run_in_worker(
  39         {
  40             err = s->ops->fstat(&s->ctx, fd, stbuf);
  41             if (err < 0) {
  42                 err = -errno;
  43             }
  44         });
  45     return err;
  46 }
  47
  48 int v9fs_co_open(V9fsState *s, V9fsFidState *fidp, int flags)
  49 {
  50     int err;
  51
  52     v9fs_co_run_in_worker(
  53         {
  54             fidp->fs.fd = s->ops->open(&s->ctx, fidp->path.data, flags);
  55             if (fidp->fs.fd == -1) {
  56                 err = -errno;
  57             } else {
  58                 err = 0;
  59             }
  60         });
  61     return err;
  62 }
  63
  64 int v9fs_co_open2(V9fsState *s, V9fsFidState *fidp, char *fullname, gid_t gid,
  65                   int flags, int mode)
  66 {
  67     int err;
  68     FsCred cred;
  69
  70     cred_init(&cred);
  71     cred.fc_mode = mode & 07777;
  72     cred.fc_uid = fidp->uid;
  73     cred.fc_gid = gid;
  74     v9fs_co_run_in_worker(
  75         {
  76             fidp->fs.fd = s->ops->open2(&s->ctx, fullname, flags, &cred);
  77             err = 0;
  78             if (fidp->fs.fd == -1) {
  79                 err = -errno;
  80             }
  81         });
  82     return err;
  83 }
  84
  85 int v9fs_co_close(V9fsState *s, V9fsFidState *fidp)
  86 {
  87     int fd;
  88     int err;
  89
  90     fd = fidp->fs.fd;
  91     v9fs_co_run_in_worker(
  92         {
  93             err = s->ops->close(&s->ctx, fd);
  94             if (err < 0) {
  95                 err = -errno;
  96             }
  97         });
  98     return err;
  99 }