hw/9pfs/coxattr.c

   1 /*
   2  * 9p backend
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 /*
  15  * Not so fast! You might want to read the 9p developer docs first:
  16  * https://wiki.qemu.org/Documentation/9p
  17  */
  18
  19 #include "qemu/osdep.h"
  20 #include "fsdev/qemu-fsdev.h"
  21 #include "qemu/thread.h"
  22 #include "qemu/coroutine.h"
  23 #include "qemu/main-loop.h"
  24 #include "coth.h"
  25
  26 int coroutine_fn v9fs_co_llistxattr(V9fsPDU *pdu, V9fsPath *path, void *value,
  27                                     size_t size)
  28 {
  29     int err;
  30     V9fsState *s = pdu->s;
  31
  32     if (v9fs_request_cancelled(pdu)) {
  33         return -EINTR;
  34     }
  35     v9fs_path_read_lock(s);
  36     v9fs_co_run_in_worker(
  37         {
  38             err = s->ops->llistxattr(&s->ctx, path, value, size);
  39             if (err < 0) {
  40                 err = -errno;
  41             }
  42         });
  43     v9fs_path_unlock(s);
  44     return err;
  45 }
  46
  47 int coroutine_fn v9fs_co_lgetxattr(V9fsPDU *pdu, V9fsPath *path,
  48                                    V9fsString *xattr_name, void *value,
  49                                    size_t size)
  50 {
  51     int err;
  52     V9fsState *s = pdu->s;
  53
  54     if (v9fs_request_cancelled(pdu)) {
  55         return -EINTR;
  56     }
  57     v9fs_path_read_lock(s);
  58     v9fs_co_run_in_worker(
  59         {
  60             err = s->ops->lgetxattr(&s->ctx, path,
  61                                     xattr_name->data,
  62                                     value, size);
  63             if (err < 0) {
  64                 err = -errno;
  65             }
  66         });
  67     v9fs_path_unlock(s);
  68     return err;
  69 }
  70
  71 int coroutine_fn v9fs_co_lsetxattr(V9fsPDU *pdu, V9fsPath *path,
  72                                    V9fsString *xattr_name, void *value,
  73                                    size_t size, int flags)
  74 {
  75     int err;
  76     V9fsState *s = pdu->s;
  77
  78     if (v9fs_request_cancelled(pdu)) {
  79         return -EINTR;
  80     }
  81     v9fs_path_read_lock(s);
  82     v9fs_co_run_in_worker(
  83         {
  84             err = s->ops->lsetxattr(&s->ctx, path,
  85                                     xattr_name->data, value,
  86                                     size, flags);
  87             if (err < 0) {
  88                 err = -errno;
  89             }
  90         });
  91     v9fs_path_unlock(s);
  92     return err;
  93 }
  94
  95 int coroutine_fn v9fs_co_lremovexattr(V9fsPDU *pdu, V9fsPath *path,
  96                                       V9fsString *xattr_name)
  97 {
  98     int err;
  99     V9fsState *s = pdu->s;
 100
 101     if (v9fs_request_cancelled(pdu)) {
 102         return -EINTR;
 103     }
 104     v9fs_path_read_lock(s);
 105     v9fs_co_run_in_worker(
 106         {
 107             err = s->ops->lremovexattr(&s->ctx, path, xattr_name->data);
 108             if (err < 0) {
 109                 err = -errno;
 110             }
 111         });
 112     v9fs_path_unlock(s);
 113     return err;
 114 }